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Question: Among faces in a cube, find the number of pairs of faces that are parallel to each other. Answer: A cube has 6 faces, and each face is a square. The faces of a cube are arranged in pairs that are parallel to each other. There are 3 pairs of parallel faces in a cube: 1. The top face is parallel to the bottom ...
Question: Yuna threaded 380 beads in an hour, and Eunji threaded 325 beads in an hour. When the two of them threaded beads at a constant speed for 8 hours, how many more beads did Yuna thread than Eunji? Answer: To find out how many more beads Yuna threaded than Eunji, we first need to calculate the total number of bea...
Question: At a constant speed, a bus travels a distance of 17.28 kilometers (km) in 16 minutes, and a car travels a distance of 8.52 kilometers (km) in 6 minutes. If a bus and a car start at the same time from the same place, which one will go farther after 15 minutes? Answer: First, let's calculate the speed of the bu...
Question: What is the sum of the numbers greater than 1.1 in 1.4, 9/10, 1.2, 0.5, and 13/10? Answer: To find the sum of the numbers greater than 1.1, we first need to identify which numbers are greater than 1.1. Given numbers: 1.4, 9/10, 1.2, 0.5, and 13/10. Let's convert the fractions to decimal to make it easier to...
Question: How many three-digit numbers with a hundredth digit of 3 and less than 306? Answer: To find the three-digit numbers with a hundredth digit of 3 and less than 306, we need to consider the numbers starting from 300 up to 305. The numbers are: 300, 301, 302, 303, 304, 305 There are 6 such numbers.
Question: Among Jungkook, Jimin, and Yoongi, you are going to vote 2 people by allowing duplication anonymously. How many possible cases are there? Answer: Since you are allowing duplication in your votes and voting for 2 people out of the 3 (Jungkook, Jimin, and Yoongi), you can vote for the same person twice or two d...
Question: Jimin was presented with (a) box and (b) box. Which box is lighter when (b) box is heavier than (a) box? Answer: If (b) box is heavier than (a) box, then (a) box is lighter.
Question: Find the number of cases in which A or B is at the forefront when three of the four students are selected from A, B, C, and D and placed in a line. Answer: To find the number of cases in which A or B is at the forefront when three of the four students (A, B, C, and D) are selected and placed in a line, we can...
Question: Grandpa bought 15 apples and gave 7 of them to Yoongi. How many apples are left for Grandpa? Answer: Grandpa had 15 apples and gave away 7 of them to Yoongi. To find out how many apples are left for Grandpa, we subtract the number of apples he gave away from the total number he had: 15 apples - 7 apples = 8 ...
Question: The number is two digits between 70 and 80. This number is divisible by 8. Find the number. Answer: To find the number that is two digits, between 70 and 80, and divisible by 8, we can list the multiples of 8 and see which one falls in the given range. The multiples of 8 are: 8, 16, 24, 32, 40, 48, 56, 64, 7...
Question: The sum of the number of marbles that Yunjae and Minjeong have is 43, and Yunjae has 5 more than Minjeong. Find how many marbles Minjeong has. Answer: Let's denote the number of marbles Minjeong has as \( M \). Since Yunjae has 5 more marbles than Minjeong, we can express the number of marbles Yunjae has as \...
Question: Taeyoung and Minji have the same length of wire. Using all of these wires without overlapping each other, Taeyoung made a regular hexagon with a side length of 4 centimeters (cm), and Minji made a square. What is the area of Minji's square in square centimeters (cm2) ? Answer: First, let's calculate the total...
Question: There are five numbers 10, 11, 12, 13, and 14. What is the smallest number multiplied by the next smallest number? Answer: The smallest number among the given numbers is 10, and the next smallest number is 11. To find the smallest number multiplied by the next smallest number, we multiply 10 by 11: 10 * 11...
Question: There are three numbers A, B and C. A is the number of 4 groups of 10 and 8 units. B is one less than 50. C is 7 greater than 40. Which number is the largest? Answer: Let's calculate each number: A: The number of 4 groups of 10 and 8 units is \(4 \times 10 + 8 = 40 + 8 = 48\). B: One less than 50 is \(50 - ...
Question: Find the number of all diagonals of the octadecagon. Answer: An octadecagon is a polygon with 18 sides. The formula to find the number of diagonals (D) in a polygon with n sides is: D = n(n - 3) / 2 For an octadecagon, n = 18. Plugging this into the formula, we get: D = 18(18 - 3) / 2 D = 18(15) / 2 D = 27...
Question: Seokgi buys school supplies with half of his money and sweets with the other half of his remaining money. If Seokgi has 1250 won left over after buying sweets, how much money did he have at the beginning? Answer: Let's call the amount of money Seokgi had at the beginning X won. He spends half of his money on...
Question: How many fractions with a two-digit denominator have the same magnitude as 7/8? Answer: To find fractions that are equivalent to 7/8, we need to find fractions where the numerator and denominator have been multiplied by the same integer. The fraction 7/8 is in its simplest form, so we can find equivalent frac...
Question: Hanbyeol and Seulgi ran. During the same period, Hanbyeol ran 10.2 kilometers (km) at 1/100, and Seulgi ran 100 meters (m). Who ran more? Answer: To compare the distances run by Hanbyeol and Seulgi, we need to convert their distances to the same unit. Let's convert Hanbyeol's distance from kilometers to meter...
Question: Among 48 children, 38 children could do A and 29 children could do B. How many children can do both A and B if there is no child who can neither A nor B? Answer: Let's denote the number of children who can do both A and B as X. According to the problem, all 48 children can do either A or B or both, since the...
Question: Doyeon estimated 1 liter (L) of grape juice as 1100 milliliters (㎖) and Mingyu estimated it as 850 milliliters (㎖). Which of the two people came closer to estimating the amount of juice? Answer: 1 liter (L) is exactly equal to 1000 milliliters (㎖). Doyeon's estimate was 1100 ㎖, which is 100 ㎖ more than the ...
Question: It is 1 kilometer (km) 700 meters (m) from Shinyoung's house to the village office, and the distance from the village office to the school is 900 meters (m). How far is the midpoint of the distance starting from Shin-Young's house to the district office through the school, from Shin-Young's house in meters (m...
Question: There are two numbers 0.8 and 1/2. How many numbers are greater than 3? Answer: Neither 0.8 nor 1/2 (which is 0.5 when converted to a decimal) is greater than 3. Therefore, there are 0 numbers greater than 3 in the given set.
Question: Pencils and ballpoint pens were arranged in 10 rows both horizontally and vertically. If you place a ballpoint pen around the perimeter and a pencil inside, how many pencils are there in all? Answer: If pencils and ballpoint pens are arranged in 10 rows both horizontally and vertically, we have a 10x10 grid. ...
Question: There are 17 (a) candies and 19 (b) candies in the bag. If you distribute these candies in this bag equally to 9 people regardless of type, how many candies can each person get? Answer: To find out how many candies each person can get, we need to calculate the total number of candies and then divide that numb...
Question: When you add a number plus 3/5 of that number, you get 240. What number is it? Answer: Let's call the number we're looking for "x". According to the problem, we have: x + (3/5)x = 240 To solve for x, we first need to combine like terms. To do this, we need to find a common denominator for the terms involvin...
Question: When 15 is multiplied by a certain number, the result is 45. What is the result of subtracting 1 from the certain number? Answer: Let's call the certain number "x". According to the problem, when 15 is multiplied by x, the result is 45. We can write this as an equation: 15 * x = 45 To find the value of x, w...
Question: ABCDE divided by 6 equals 13579 with a remainder of 0. Add DE to ABC of the five-digit number ABCDE. Answer: Let's first find the five-digit number ABCDE that is divisible by 6 and equals 13579 when divided by 6. ABCDE ÷ 6 = 13579 To find ABCDE, we multiply 13579 by 6: ABCDE = 13579 × 6 ABCDE = 81474 Now...
Question: Jungkook is 12 years younger than his uncle. Three years later, Jungkook and his uncle's combined ages will be 38 years old. How old is Jungkook this year? Answer: Let's denote Jungkook's current age as J and his uncle's current age as U. According to the information given, Jungkook is 12 years younger than ...
Question: A, B, and C are different numbers. 1 is 8 less than C, and adding 5 to A is equal to B. If 9 minus 4 is A, what is the difference between B and C? Answer: Let's solve the problem step by step: 1. We know that 1 is 8 less than C. So we can write the equation: C - 8 = 1 C = 1 + 8 C = 9 2. We also kno...
Question: Some numbers are multiples of 3 and multiples of 4. Find the smallest of all possible numbers. Answer: To find the smallest number that is a multiple of both 3 and 4, we need to find the least common multiple (LCM) of 3 and 4. The multiples of 3 are: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ... The multiples of ...
Question: What is the sum of the sides of a hexagon, triangle, and quadrilateral? Answer: To find the sum of the sides of these shapes, we need to add the number of sides for each shape: - A hexagon has 6 sides. - A triangle has 3 sides. - A quadrilateral has 4 sides. Now, we add them together: 6 (hexagon) + 3 (tria...
Question: Yumi walked 8 kilometers (km) in 2 hours, and Woong walked 13 kilometers (km) in 3 hours. Which of the two walks faster? Answer: To determine who walks faster, we need to calculate the walking speed of each person. Speed is calculated by dividing the distance traveled by the time taken to travel that distance...
Question: A number with 5 1s, 7 0.1s, 21 0.01s, and 53 0.001s equals 1/10 of the variable. How much is the variable including the decimal point? Answer: Let's first calculate the sum of the numbers given: 5 ones = 5 * 1 = 5 7 tenths (0.1s) = 7 * 0.1 = 0.7 21 hundredths (0.01s) = 21 * 0.01 = 0.21 53 thousandths (0.001s...
Question: There are eight rectangular-shaped parks in Hyeonju's neighborhood. The length of all libraries is the same with 300 meters (m) and the area is the same as well, and if the sum of the areas of the libraries is 0.6 square kilometers (km2), what is the width of the library in meters (m)? Answer: First, let's co...
Question: You want to paint each of the 5 fences with one of 3 different colors of paint. How many ways can you paint? Answer: To determine the number of ways you can paint the 5 fences with 3 different colors, you can use the counting principle. Each fence can be painted with any of the 3 colors independently of the o...
Question: There are 100 monks and 100 dumplings, and we handed out 3 dumplings per each great monk and 1 dumpling for every three little monks. When there are no monks that did not receive dumpling, how many great monks are there? Answer: Let's denote the number of great monks as G and the number of little monks as L. ...
Question: Three students order snacks at a cafe. Sangwoo ordered 8 snacks and Jaehyuk ordered 10. Minsu bought more snacks than Sangwoo and less than Jaehyuk. How many snacks did Minsu buy? Answer: Minsu bought more snacks than Sangwoo (who bought 8) and less than Jaehyuk (who bought 10). Therefore, Minsu could have bo...
Question: When 7 identical marbles were placed on a scale, and it read 50.68 grams (g). If you put 1 marble on the scale, what number will the scale indicate? Answer: To find the weight of 1 marble, you need to divide the total weight by the number of marbles. Total weight of 7 marbles = 50.68 grams Number of marble...
Question: Hoseok multiplied a certain number by 8 to get 64. Find the result of multiplying this number by 7. Answer: To find the number Hoseok multiplied by 8 to get 64, we divide 64 by 8: 64 ÷ 8 = 8 Now, to find the result of multiplying this number by 7, we multiply 8 by 7: 8 × 7 = 56 So, the result of multiplyi...
Question: Jungkook has 5 bundles of 8 pieces of colored paper. He is going to arrange this colored paper into 9 rows of 6 sheets each. How many more sheets of colored paper does he need? Answer: First, let's find out how many pieces of colored paper Jungkook currently has. He has 5 bundles of 8 pieces each, so: 5 bund...
Question: Find the sum of the largest and smallest odd numbers from 5 to 12. Answer: The smallest odd number from 5 to 12 is 5, and the largest odd number in that range is 11. So, the sum of the largest and smallest odd numbers from 5 to 12 is 5 + 11 = 16.
Question: There is a pentagon. What is the sum of the number of edges and the number of vertices? Answer: A pentagon has 5 edges and 5 vertices. The sum of the number of edges and the number of vertices is 5 (edges) + 5 (vertices) = 10.
Question: There is a trapezoid with an upper side of 10 centimeters (cm) and a lower side that is twice the length of the upper side. If the height of this trapezoid is 5 centimeters (cm), What is the area of this trapezoid in square centimeters (cm2)? Answer: The area of a trapezoid can be calculated using the formula...
Question: 12 boxes of 25 apples were sold in 4 days. On average, how many apples are sold per day? Answer: To find the average number of apples sold per day, we first need to find the total number of apples sold in 4 days, and then divide that number by 4. Total number of apples sold in 4 days = Number of boxes * Numb...
Question: When you multiply a certain number by 8 and add 5400 and divide it by 12, the resulting quotient is 530. Find that number. Answer: Let's call the certain number "x". According to the problem, we have the following equation: (8x + 5400) / 12 = 530 Now, let's solve for x: 8x + 5400 = 530 * 12 8x + 5400 = 636...
Question: Yoongi got 15 after subtracting 46 from a certain number. Next, Hoseok subtracted 29 from this same number to get the result. What is the value of this result? Answer: Let's call the certain number "X." According to the information given, when Yoongi subtracted 46 from X, he got 15. So we can write the equat...
Question: The perimeter of a square with one side length of 80 centimeters (cm) is equal to the perimeter of a rectangle with a vertical length of 100 centimeters (cm). How many centimeters (cm) is the horizontal length of the rectangle? Answer: The perimeter of a square is calculated by adding up all four sides. Since...
Question: There is a square-shaped cookie. When you add up all the sides of this cookie, you get 17.8 centimeters (cm). Find the length of one side of the cookie. Answer: A square has four equal sides. If the total perimeter of the square-shaped cookie is 17.8 cm, you can find the length of one side by dividing the tot...
Question: When any number is divided by 20, the quotient is 15 and the remainder is 6. What number is it? Answer: To find the number, we can use the formula for division: Number = Divisor * Quotient + Remainder In this case, the divisor is 20, the quotient is 15, and the remainder is 6. Plugging these values into the...
Question: Jungkook, Yoojeong, and Seokjin are standing on the stairs. The stairs Jungkook is standing on are the 19th stairs. If Yoojeong climbed 8 steps higher than Jungkook and Seokjin climbed 5 steps less than Yoojung, how many steps is Seokjin higher than Jungkook? Answer: Jungkook is standing on the 19th stair. Y...
Question: If you use the number cards 4, 5, and 6 once to form a 3-digit number less than 560, how many cases match the condition? Answer: To form a 3-digit number less than 560 using the numbers 4, 5, and 6, we need to consider the hundreds place first, as it will determine the overall value of the 3-digit number. Si...
Question: Minyoung collected 4 and 9. Yuna collected 5 and 6. Whose sum of numbers is greater? Answer: To find out whose sum of numbers is greater, we need to add the numbers collected by each person. For Minyoung: 4 + 9 = 13 For Yuna: 5 + 6 = 11 Comparing the sums: Minyoung's sum = 13 Yuna's sum = 11 Minyoung's su...
Question: In the jumping rope competition, Jimin placed 6th and Jungkook placed 8th. Taehyung did better than Jungkook but worse than Jimin. What is Taehyung's rank? Answer: Taehyung's rank would be 7th because he did better than Jungkook who was 8th and worse than Jimin who was 6th.
Question: Find the sum of the largest and smallest even numbers less than or equal to 49. Answer: The largest even number less than or equal to 49 is 48. The smallest even number less than or equal to 49 is 2 (since 0 is not typically considered in such ranges, but if you do consider 0 as the smallest even number, th...
Question: Jungkook collected 6 multiplied by 3, and Yoongi collected 4. Who got the bigger number? Answer: Jungkook collected 6 multiplied by 3, which equals 18. Yoongi collected 4. Therefore, Jungkook got the bigger number.
Question: The cross-section of a sphere with a radius of 4 centimeters (cm) passing through the center of the sphere is a circle. Find the diameter of this circle. Answer: The cross-section of a sphere that passes through the center of the sphere is known as a great circle. Since the cross-section passes through the ce...
Question: Twenty-seven dice with each edge of 3 centimeters (cm) are stacked in the shape of a cube. What is the surface area of the stacked cubes in square centimeters (cm2)? Answer: If 27 dice are stacked in the shape of a cube, it means that the arrangement is 3 dice along the length, 3 dice along the width, and 3 d...
Question: The area of a rectangular notebook is 1.77 square centimeters (cm2). If the width is 3 centimeters (cm), how many centimeters (cm) is the length? Answer: To find the length of the rectangular notebook, we can use the formula for the area of a rectangle: Area = Length × Width We are given the area (1.77 cm²)...
Question: When a basket containing several watermelons of the same weight was 63 kilograms (kg), its weight changed to 34 kilograms (kg) after half of the watermelon was removed. What is the weight of watermelons in total? Answer: Let's denote the weight of the basket without any watermelons as B kg, and the weight of ...
Question: There were 156 Strawberry Flavored Candies and 267 Lemon Flavored Candies in the box. I wrapped 115 of these and gave them to a friend. How many candies do I have left after giving my friend? Answer: You started with a total of 156 Strawberry Flavored Candies and 267 Lemon Flavored Candies. To find out how ma...
Question: There are three people: Youngseo, Gunuk, and Suhwan. When Youngseo is heavier than Gunwook and Suhwan is heavier than Youngseo, who is the heaviest? Answer: Suhwan is the heaviest. Since Suhwan is heavier than Youngseo, and Youngseo is heavier than Gunuk, it follows that Suhwan is heavier than both Youngseo a...
Question: It is said that several 25 centimeters (cm) bars are to be made. If you have a 2 meter (m) 50 centimeters (cm) bar, how many times do you have to cut the bar? Answer: First, we need to convert the length of the bar from meters to centimeters to make it easier to calculate. 1 meter = 100 centimeters So, a 2...
Question: Hoseok subtracted 7 from a certain number to get 9. What is the result of multiplying this number by 3? Answer: Let's call the certain number x. According to the information given, Hoseok subtracted 7 from x to get 9: x - 7 = 9 To find x, we add 7 to both sides of the equation: x - 7 + 7 = 9 + 7 x = 16 N...
Question: There are multi-colored pens in the stationery store. 3/10 of the pens in the stationery store are red and 1/5 are black. There are 12 red pens in the stationery store. Find how many black pens are in the stationery store. Answer: If 3/10 of the pens are red and there are 12 red pens, we can set up the follow...
Question: There are 48 students in Seokjin's class. One day, there were 37 students who did math homework and 42 students who did Korean homework. If there is no student who has not done both math homework and Korean homework, how many students have done both math homework and Korean homework? Answer: Let's denote the ...
Question: You had to subtract 36 from a number, but you mistakenly subtracted 63 and got 8 as an answer. Find the answer to the correct calculation. Answer: If you mistakenly subtracted 63 instead of 36 and got 8 as an answer, it means that the original number minus 63 equals 8. Let's call the original number "x". So w...
Question: There is a box in the shape of a cube. If the sum of all the edges of the box is 144 centimeters (cm), how many centimeters (cm) is the length of one edge? Answer: A cube has 12 edges, and all edges of a cube are of equal length. If the sum of all the edges is 144 cm, we can find the length of one edge by div...
Question: When a wire was divided by intervals of 120 centimeters (cm), it was split into two parts, with 2.4 centimeters (cm) being left. Find how many centimeters (cm) of wire you'll get if you divide this wire into three parts. Answer: To solve this problem, we first need to find the total length of the wire. We kno...
Question: Yoo Seung's number of marbles is three times that of Han-sol's, and Han-sol's has 15 more marbles than Young-soo's. If the three of them have 165 marbles, how many marbles does Yoo Seung have? Answer: Let's denote the number of marbles Young-soo has as Y. According to the problem, Han-sol has 15 more marbles ...
Question: If the sum of two consecutive natural numbers is 39, find the smallest of the two natural numbers. Answer: Let the smallest of the two consecutive natural numbers be \( n \). Since the numbers are consecutive, the next natural number is \( n + 1 \). According to the problem, the sum of these two numbers is 3...
Question: Among Jungkook, Jimin, Yoongi, and Yuna, I'm trying to choose 2 people. How many options are there in total? Answer: To choose 2 people out of 4 (Jungkook, Jimin, Yoongi, and Yuna), you can use the combination formula which is: nCr = n! / [r! * (n - r)!] where n is the total number of items to choose from, ...
Question: When 13 is divided by 7, the quotient is 1 and the remainder is A. Find the value of A at this time. Answer: When 13 is divided by 7, the division can be expressed as: 13 = 7 * 1 + A Here, 1 is the quotient and A is the remainder. To find the value of A, we can rearrange the equation: A = 13 - (7 * 1) A = ...
Question: We subtracted 50 from a certain number, divided it by 4, multiplied it by 3, and added 28. If the final result is 73, what is the certain number? Answer: Let's call the certain number "x". We can write the operations as an equation: ((x - 50) / 4) * 3 + 28 = 73 Now, let's solve for x step by step: 1. Subtr...
Question: Jinho went to the stationery store with 2,500 won and bought 5 erasers which cost 120 won each and 3 pencils that cost 350 won each. Find out the remaining money Jinho has after buying erasers and pencils. Answer: First, let's calculate the total cost of the erasers. The cost of one eraser is 120 won, so th...
Question: There are 204 male students and 468 female students in (A) village, 334 male students and 516 female students in (B) village, 427 male students and 458 female students in (C) village, and 549 male students and 239 female students in (D) village. What is the difference between the total number of boys and tota...
Question: Students give their presentations taking turns. If Eunjeong's turn is at the 6th from the last, and the 7 students give presentations ahead of Eunjeong. How many students are there in total? Answer: If Eunjeong's turn is 6th from the last, it means there are 5 students who present after her. Since 7 students ...
Question: Find the area of a rectangle whose width and length differ by 6 centimeters (cm) and whose perimeter is 68 centimeters (cm). Answer: Let's denote the width of the rectangle as \( w \) and the length as \( l \). According to the problem, the length is 6 cm more than the width, so we can write: \( l = w + 6 \)...
Question: Taehyung, Minju, Sangmin, Yoonjung, and Yoojung entered the finish line in that order. Who entered first? Answer: Taehyung entered first.
Question: I was to subtract 36 from a number, but mistakenly subtracted 63, and got 24 as a result. Find out the right answer to the calculation. Answer: If you mistakenly subtracted 63 instead of 36 and got 24 as a result, we can first find the original number by reversing the incorrect subtraction: 24 (result after ...
Question: The length of one edge of a cube is 9 centimeters (cm). From this cube, a small cube with one edge 2 centimeters (cm) long was cut from the vertex. What is the surface area of the remaining part in square centimeters (cm2)? Answer: To find the surface area of the remaining part of the cube after cutting out a...
Question: Find the number of three-digit natural numbers that can be made by drawing three of the number cards 3, 5, 8, and 9. Answer: To find the number of three-digit natural numbers that can be made by drawing three of the number cards 3, 5, 8, and 9, we need to consider that each of the three places in the three-di...
Question: Jungkook wants to equally distribute 15 sheets of colored paper to 3 friends. How many sheets of colored paper do they get each? Answer: To equally distribute 15 sheets of colored paper to 3 friends, you divide the total number of sheets by the number of friends: 15 sheets ÷ 3 friends = 5 sheets per friend ...
Question: A pyramid has 14 edges. Find the number of vertices of this pyramid. Answer: A pyramid typically has a base and triangular faces that meet at a common vertex (the apex). The number of edges in a pyramid depends on the shape of the base. If the base is a polygon with n sides (n-gon), then the pyramid will have...
Question: 6 is a number added 3 to the number. What number is it that is 5 greater than the number? Answer: Let's call the original number "x". According to the first statement, "6 is a number added 3 to the number," we can write the equation: x + 3 = 6 Now, we solve for x: x = 6 - 3 x = 3 The original number is 3...
Question: How many ways are there for you to buy 2 fruits out of apples, pears, melons, persimmons, and watermelons at the fruit store? Answer: To find the number of ways to buy 2 fruits out of the given 5 (apples, pears, melons, persimmons, and watermelons), we can use the combination formula, which is: C(n, k) = n! ...
Question: Jimin wanted to add a particular number to 34. If the result of dividing 96 by that particular number was 6, find the correct result. Answer: To find the particular number that Jimin wanted to add to 34, we need to find the number that, when divided into 96, gives a result of 6. Let's call the particular nu...
Question: Each of the three boxes contains 16 pieces of bread A, each weighing 200 grams (g). There are also two boxes containing 12 pieces of bread B, each weighing 250 grams (g). If the empty boxes weigh the same, which bread is contained in one box whose weight is heavier? Answer: First, let's calculate the total we...
Question: What number is 1/3 when you add -5/12 to it? Answer: To find the number that is 1/3 when you add -5/12 to it, you need to subtract -5/12 from 1/3. First, let's convert 1/3 to a fraction with a denominator of 12 to make the subtraction easier: 1/3 = 4/12 (since 4 * 3 = 12) Now, subtract -5/12 from 4/12: 4...
Question: There is a square piece of land with sides measuring 200 meters (m). What is the area of this land? Answer: The area of a square can be calculated using the formula: Area = side length × side length Given that each side of the square piece of land measures 200 meters, we can calculate the area as follows: ...
Question: The four arithmetic operations were carried out using only the number 5 up to a certain number. What is the number if you first add 5, then multiply by 5, then subtract 5, then divide by 5 to get 5? Answer: Let's call the certain number x. We will perform the operations in reverse order to find x. 1. The res...
Question: There are pharmacies every 22.75 meters (m) on one side of the 364 meters (m) long road, and shops every 45.5 meters (m) on the other side. Which are more on this road, pharmacies or shops? Answer: To find out which are more, we need to calculate the number of pharmacies and shops along the road. For pharmac...
Question: There is a rectangular vacant lot with the width and length of 36 meters (m) and 72 meters (m), respectively. Find the maximum number of boxes that can be stored in this clearing, whose base is a rectangle measuring 3 meters (m) wide and 4 meters (m) long. Answer: To find the maximum number of boxes that can ...
Question: The mart sold all 12 boxes of apples in 4 days. If each crate contained 25 apples, find the average number of apples that were sold per day. Answer: To find the average number of apples sold per day, we first need to calculate the total number of apples sold in the 4 days. Since each box contained 25 apples a...
Question: Woojin spends 1/3 of the day sleeping, 3/4 of the remaining time studying, and 1/4 of the rest of the time playing computer games. How many hours does Woojin spend playing computer games in a day? Answer: Let's assume there are 24 hours in a day. First, we calculate the time Woojin spends sleeping: 1/3 of 24...
Question: Which of the five numbers 5, 8, 1, 2, 6 is the smallest? Answer: The smallest number among 5, 8, 1, 2, 6 is 1.
Question: Seokjin solved 12 Korean problems, and he solved 7 more afterwards. How many problems did he solve? Answer: Seokjin initially solved 12 Korean problems. After solving 7 more, the total number of problems he solved is: 12 (initial problems) + 7 (additional problems) = 19 problems So, Seokjin solved a total o...
Question: What is the second greatest number with 3 in the tens place using 3 numbers out of 4, 3, 1, 7, and 9? Answer: To find the second greatest number with 3 in the tens place using the numbers 4, 3, 1, 7, and 9, we need to place the 3 in the tens place and then arrange the remaining numbers in descending order to ...
Question: Use the number cards 1, 6, and 8 all once to find the third small three-digit number. Answer: To find the third smallest three-digit number using the digits 1, 6, and 8, we need to arrange them in ascending order based on their place value. The smallest digit should go in the hundreds place, the next smalles...
Question: The surface area of one cube is 150 square centimeters (cm2). In this case, find the sum of the lengths of all the edges of the cube. Answer: To find the sum of the lengths of all the edges of a cube, we first need to determine the length of one edge of the cube. The surface area (SA) of a cube is given by t...
Question: The distances from Seungheon's house to the library, park, and clothing store are 1.912 kilometers (km), 876 meters (m), and 1.054 kilometers (km), respectively. Which is the second closest to the house? Answer: To determine the second closest location to Seungheon's house, we need to compare the distances in...