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Question: At the presentation, students take turns giving presentations. Eunjung will be the 6th speaker from the back, and the seven students in front of Eunjung will make the presentation. How many students are giving presentations? Answer: If Eunjung is the 6th speaker from the back, and there are 7 students in fron...
Question: Of the 1,260 people who entered the exhibition hall, 7/18 were women. If 6/11 of the men who entered wore glasses, how many men that visited the exhibition hall wore glasses? Answer: First, let's find out how many women entered the exhibition hall. Since 7/18 of the people were women, we can calculate the nu...
Question: How many vertices are there in a regular icosahedron-shaped box? Answer: A regular icosahedron is a polyhedron with 20 identical equilateral triangular faces, 30 edges, and 12 vertices. So, a regular icosahedron-shaped box would have 12 vertices.
Question: 9 is the number you get when you add 12 to this number and divide it by 8. What is 35 minus half this number? Answer: Let's call the unknown number x. According to the problem, when you add 12 to x and then divide by 8, you get 9. So we can write the equation as: (x + 12) / 8 = 9 To find x, we first multip...
Question: When you multiply a number by 2, subtract it by 37, and then add it by 25 before dividing it by 8 equals 5. What is the number? Answer: Let's call the number you're looking for "x". According to the operations you've described, we can set up the following equation: ((2x - 37 + 25) / 8) = 5 Now, let's solve ...
Question: Taehyung, Minju, Sangmin, Yoonjung, and Yoojung entered the finish line in this order. Who was the first to enter? Answer: Taehyung was the first to enter the finish line.
Question: Hyeongjun has a two-year age gap with his older sister. If the ages of the siblings added together were 26, how old is Hyungjun's older sister? Answer: Let's denote Hyeongjun's age as H and his older sister's age as S. According to the information given: 1. Hyeongjun has a two-year age gap with his older sis...
Question: You bought a total of 8 cookies, 300 won each and 500 won each, and paid 3,000 won. How many cookies did you buy that cost 500 won each? Answer: Let's denote the number of 300 won cookies as x and the number of 500 won cookies as y. We know that the total number of cookies is 8, so we have: x + y = 8 (Equat...
Question: When we should multiply a certain number by 16 and add 8, we mistakenly divide it by 16, and the quotient is 8 and the remainder is 4. Find the correct calculated value. Answer: Let's denote the certain number as \( x \). According to the mistake, the number was divided by 16, and the quotient was 8 with a r...
Question: There is a white piece of paper in the shape of a rectangle measuring 32 centimeters (cm) wide and 74 centimeters (cm) long. You are going to cut this paper to make several identical square shapes without any excess. How many of th elargest squares can you make? Answer: To make the largest identical squares w...
Question: How many meters (m) of wire are needed to make a rectangle with 480 centimeters (cm) width and 360 centimeters (cm) length? Answer: To find the amount of wire needed to make a rectangle, we need to calculate the perimeter of the rectangle. The perimeter of a rectangle is given by the formula: Perimeter = 2 *...
Question: Bomi bought candy for 350 won and chocolate for 500 won and paid 1,000 won. How much change should Bomi get? Answer: Bomi bought candy for 350 won and chocolate for 500 won, so the total cost of the items is: 350 won (candy) + 500 won (chocolate) = 850 won Bomi paid with 1,000 won, so the change Bomi should...
Question: Which of 15, 18, 29, and 21 is a multiple of 2 that is less than 20? Answer: The number that is a multiple of 2 (even number) and less than 20 is 18.
Question: Five different drinks are sold in a convenience store. You are going to pick three of them and give one to your friend, one to your younger brother, and one to your older sister. Find the number of cases in this situation. Answer: To find the number of cases, we can use the concept of permutations since the o...
Question: I made an ade with 3, 2/6 spoons of blueberry syrup, and 21/6 spoons of grapefruit syrup. Find out which syrup is contained more in the ade, the blueberry syrup or the grapefruit syrup? Answer: To compare the amounts of blueberry syrup and grapefruit syrup in the ade, we need to convert the fractions to a com...
Question: Nine students are standing in a line at the bus stop waiting for the bus. How many students are between the second student from the back and the third student from the front? Answer: Let's visualize the line of students from the front to the back: 1st student from the front, 2nd student from the front, 3rd s...
Question: In a park with a circumference of 1 kilometer (km) and 500 meters (m), trees are to be planted at intervals of 30 meters (m). If the cost of one tree is 5,000 mill, how much does it cost to buy the tree you need? Answer: First, we need to calculate the total distance around the park where the trees will be pl...
Question: Jimin gave 2 persimmons to Yuna and 7 apples to Minyoung. How many fruits did Jimin share? Answer: Jimin shared a total of 2 persimmons + 7 apples = 9 fruits.
Question: Seokjin put 2 persimmons in the box. How many fruits are in the box when 7 more apples are added to the box? Answer: Seokjin initially put 2 persimmons in the box. After adding 7 more apples, the total number of fruits in the box would be the sum of the persimmons and the apples. 2 persimmons + 7 apples = 9 ...
Question: The eight-digit number 757AB384 is divisible by 357. Get B. Answer: To solve this problem, we need to find the value of B such that the eight-digit number 757AB384 is divisible by 357. Let's denote the eight-digit number as N. Then N can be expressed as: N = 757AB384 = 757000000 + AB0000 + 384 = 757 * 1...
Question: Find the largest two-digit number that can be formed by picking two different numbers from 4, 2, and 1. Answer: To form the largest two-digit number using two different numbers from 4, 2, and 1, we should pick the largest number for the tens place and the second largest for the ones place. The largest number...
Question: Junhyun took a bus for a distance of 2.6 kilometers (km) and a subway for a distance of 5.98 kilometers (km) to go to the meeting place. How many kilometers (km) did Junhyun take public transportation? Answer: To find the total distance Junhyun traveled using public transportation, we need to add the distance...
Question: What is the largest three-digit number divisible by 5, 8, and 2? Answer: To find the largest three-digit number divisible by 5, 8, and 2, we need to find the least common multiple (LCM) of these numbers and then find the largest multiple of that LCM that is still a three-digit number. Since 8 is divisible by...
Question: In class presidential elections, the candidate with the highest percentage of votes becomes the class representative. 30 classmates voted, A got 12 votes, B got 3 votes, and C got 15 votes. Who is the winner of this election? Answer: Candidate C received the highest number of votes with 15 votes out of 30. Th...
Question: With the same number of students standing in each row, Yoongi is at 7 rows from the left, 13 rows from the right, 8 rows from the front, and 14 rows from the back. What is the total number of students? Answer: To find the total number of students, we need to determine the number of rows and the number of colu...
Question: Yoongi wants to read 3 of the 5 different books. Taking into account the order in which he reads them, how many ways can Yoongi read three books? Answer: To determine the number of ways Yoongi can read 3 of the 5 different books, taking into account the order in which he reads them, we can use permutations si...
Question: A number is said to be not less than 30 and not more than 50. Find the sum of all the possible values of the number. Answer: The possible values of the number are all the integers from 30 to 50, inclusive. To find the sum of these values, we can use the formula for the sum of an arithmetic series: Sum = (n/2...
Question: It is said that a 30 centimeters (cm) long candle shrinks by 1 centimeter (cm) per minute, and a 20 centimeters (cm) long candle shrinks by 0.5 centimeters (cm) per minute. Find the length of the candle when both candles become equally long. Answer: Let's denote the length of the 30 cm candle as \( L_{30} \) ...
Question: I have made a cube with a side of 10 centimeters (cm) by stacking several blocks with a side of 2 centimeters (cm). If I paint all the faces of this cube red, how many blocks have only one coloured face? Answer: To solve this problem, we need to determine how many blocks are on the surface of the larger cube ...
Question: Village A is rectangular in shape, measuring 6 kilometers (km) wide and 9 kilometers (km) long, and village B is square, measuring 8 kilometers (km) wide and 8 kilometers (km) long. Find which town has the greater perimeter. Answer: To find the perimeter of each village, we need to add up the lengths of all t...
Question: Find the number of vertices of a solid figure whose bases are parallel and congruent polygons and whose sides are six rectangles. Answer: The solid figure described is a prism with two parallel and congruent polygonal bases and six rectangular sides. Since the sides are rectangles, we know that each rectangle...
Question: You want to make a rectangle that is 63 centimeters (cm) wide by 42 centimeters (cm) tall by joining several squares together without overlapping them. To minimize the number of squares, find how many centimeters (cm) each side of the square must be. Answer: To minimize the number of squares used to create a ...
Question: You want to find the width and length of a rectangle whose perimeter is 16 centimeters (cm) and its width is 2 centimeters (cm) longer than its length. How long is its width? Answer: Let's denote the length of the rectangle as L cm and the width as W cm. According to the problem, the width is 2 cm longer than...
Question: Find the surface area of a cube whose edges are 11 centimeters (cm) long. Answer: The surface area of a cube is calculated by finding the area of one of its faces and then multiplying that by 6, since a cube has 6 faces and they are all identical squares. The area of one face of the cube is found by squaring...
Question: 125 is the result when you accidentally add 65 to a certain number that you should add 95 to . Find the result of the correct calculation. Answer: Let's call the certain number "x". According to the problem, when you accidentally add 65 to x, you get 125: x + 65 = 125 To find x, we subtract 65 from both sid...
Question: There are 34 bottles of juice in the market, and there are 3/2 times as many bottles of water as juice plus 3 bottles of water. How many bottles of bottled water and juice are there in total in the market? Answer: First, let's find out how many bottles of water there are. We are told there are 3/2 times as ma...
Question: Rounding down A76 to the nearest hundred gives 700. Find the correct number for A. Answer: Rounding down to the nearest hundred means we are looking for a number that when rounded down to the nearest hundred is 700. If we round down A76 to the nearest hundred, it means A76 is at least 700 but less than 800 ...
Question: A triangle has vertices of point A, point B, and point C. In this case, the length of side AB is 4.9 centimeters (cm), and the area of this triangle is 9.31 square centimeters (cm2). If a line is drawn perpendicular to side AB from point C and D is the point where it intersects, how many centimeters (cm) is t...
Question: If you want to make the smallest possible square-shaped piece of paper by attaching rectangular pieces of paper with a width of 20 centimeters (cm) and a length of 8 centimeters (cm) without overlapping, find how many sheets of paper you will need. Answer: To create a square-shaped piece of paper using rectan...
Question: Three classes A, B, and C took a math test. If class B's average is higher than class A's, and class C's average is higher than class A's, find the class with the lowest average. Answer: Based on the information provided, class A has the lowest average since both class B and class C have higher averages than ...
Question: I picked one from 41, 43, 45, and 47, and I got a value greater than 43 and less than 46. What is this number? Answer: The number you picked is 45, as it is the only number greater than 43 and less than 46 from the given options.
Question: You want to divide 12 kilograms (kg) and 400 grams (g) of strawberries into two different baskets. How many kilograms (kg) will the large basket contain if the large basket contains 2 kilograms (kg) 600 grams (g) more than the small basket? Answer: First, let's convert the total amount of strawberries into gr...
Question: There are N natural numbers. These natural numbers are consecutive from 1 to N, and the sum of even numbers in these numbers is 90 and the sum of odd numbers in these numbers is 100. What is the value of N? Answer: Let's denote the sum of even numbers as \( S_{even} \) and the sum of odd numbers as \( S_{odd}...
Question: Among the 18 flowers, 5 were given to Min-Young and 6 to Yoo-Jeong. How many flowers are left? Answer: Min-Young was given 5 flowers and Yoo-Jeong was given 6 flowers, so in total, they were given 5 + 6 = 11 flowers. If there were originally 18 flowers, and 11 have been given away, then the number of flowers...
Question: Find the number in the tens place of the smallest number that can be made by using all of the given number cards 0, 5, and 8 once. Answer: To find the smallest number using the digits 0, 5, and 8, we need to place the smallest digit in the hundreds place, the next smallest in the tens place, and the largest i...
Question: Yuna gave 2 apples to Minyoung and 7 persimmons to Yoojung, and the number of fruits left is 0. How many fruits did Yuna have? Answer: Yuna gave away 2 apples to Minyoung and 7 persimmons to Yoojung. To find out the total number of fruits Yuna had, we simply add the number of apples and persimmons she gave aw...
Question: Minyoung has 24 flowers. The number of flowers that Minyoung has is 4 times the number of flowers that Yoojung has. How many flowers do they have? Answer: Let's denote the number of flowers Yoojung has as Y. According to the information given, Minyoung has 4 times the number of flowers that Yoojung has. This ...
Question: There is a box in the shape of a cuboid. The sum of all edges is 224 centimeters (cm), and the box's width is 30 centimeters (cm) and its length is 22 centimeters (cm). How many centimeters (cm) is the height of this box? Answer: A cuboid has 12 edges in total, consisting of 4 edges of each dimension: length,...
Question: There is a park in the shape of a square. If the length of one side of this park is 5 kilometers (km), what is the circumference of this garden in kilometers (km)? Answer: The circumference of a square is equal to the sum of the lengths of all four sides. Since all sides of a square are equal in length, the c...
Question: A and B are single digit numbers. A is 4 greater than 2, and 3 less than B is 1. Find the sum of A and B. Answer: Let's find A first. A is 4 greater than 2, so: A = 2 + 4 A = 6 Now let's find B. We know that 3 less than B is 1, so: B - 3 = 1 B = 1 + 3 B = 4 Now we can find the sum of A and B: A + B = 6 +...
Question: Divide a number by 9 and subtract 13, then divide by 7 and subtract 8 to get 13. Find the number. Answer: Let's call the number we are trying to find "x". According to the problem, we first divide x by 9, then subtract 13, divide the result by 7, and then subtract 8 to get 13. So, we can write the equation ...
Question: There is a truck that runs at a constant speed of 2.1 kilometers (km) in 1 minute, and a taxi that runs at 10.5 kilometers (km) in 4 minutes. Find how many times the taxi is faster than the truck. Answer: To compare the speeds of the truck and the taxi, we need to calculate their speeds in the same units. Let...
Question: You have a triangle with an area of 9.31 square centimeters (cm2) and a base of 4.9 centimeters (cm). What is the height of this triangle in centimeters (cm)? Answer: The area of a triangle is given by the formula: Area = (base * height) / 2 We can rearrange this formula to solve for the height: Height = (...
Question: There are two one-digit number A and B. Find the sum of A and B in 8AA4-BBB=BBBB. Answer: Let's analyze the equation 8AA4 - BBB = BBBB. First, we can see that B must be equal to 4 because when we subtract B from 4 in the units place, we get B again. So, B = 4. Now, let's replace B with 4 in the equation: 8...
Question: You have a triangle whose base is 4.9 centimeters (cm). If the area of this triangle is 9.31 square centimeters (cm2), how many centimeters (cm) is its height? Answer: The area of a triangle is given by the formula: Area = (base * height) / 2 We are given the area of the triangle as 9.31 cm² and the base as...
Question: In a subtraction between two-digit numbers, the number 2 in the tens digit of the minuend is mistaken for 5, and the number 6 in the ones digit is mistaken for 9, and the result is 44. Find the result of the correct calculation. Answer: Let's denote the correct minuend as \( AB \) (where \( A \) is the tens d...
Question: When I went up the mountain at 3 kilometers (km) per hour and came down 2 kilometers (km) longer road at 4 kilometers (km) per hour, the total hour of going up and down took 4 hours. Find the distance for coming down. Answer: Let's denote the distance going up the mountain as \( d_{up} \) and the distance com...
Question: Jimin's family runs an orchard. When picking apples, Jimin picked 7, Grandpa 13, younger brother 8, and younger sister 5. How many more apples did the person who picked the most apples pick than the person who picked the fewest? Answer: The person who picked the most apples is Grandpa with 13 apples. The pers...
Question: You are going to paint the three parts A, B, and C that are continuously attached with five colors: red, orange, blue, yellow, and green. Find the number of cases in which a color can be used only once and adjacent areas are painted with different colors. Answer: To solve this problem, we need to consider the...
Question: If a cube has a square with a perimeter of 52 centimeters (cm) as one side, what is the surface area of the figure? Answer: To find the surface area of a cube, we first need to determine the length of one side of the cube. Since the perimeter of a square is the sum of all its sides, and a square has four equa...
Question: The average weight of the 20 male students in Eugene's class is 42 kg, and the average weight of the 20 female students is 38 kg. What is the average weight of all the students in Eugene's class in kilograms (kg)? Answer: To find the average weight of all the students in Eugene's class, we need to find the to...
Question: All of the square-shaped tiles are lined up to make a larger square. If the number of tiles on the perimeter is 52, find the number of tiles on the outermost of one side. Answer: Let's denote the number of tiles on the outermost side of the larger square as \( n \). Since the tiles are square-shaped, the larg...
Question: Find the number of numbers greater than or equal to 0.4 among 0.8, 1/2, and 0.3. Answer: To compare the numbers, we need to express them in the same format. Let's convert 1/2 to a decimal to compare it with the other two decimals. 1/2 = 0.5 (in decimal form) Now we have three decimals: 0.8, 0.5, and 0.3. W...
Question: When you divide a certain number by 10, you get 6. Find the result of subtracting 15 from the number. Answer: Let's call the certain number "x". According to the information given: x / 10 = 6 To find the value of x, we multiply both sides of the equation by 10: x = 6 * 10 x = 60 Now, to find the result of...
Question: There is a dice with one edge 20 centimeters (cm) long. Find the surface area of this dice. Answer: A dice is a cube, which means all of its edges are of equal length. If one edge of the dice is 20 cm long, then all the edges are 20 cm long. The surface area of a cube is calculated by the formula: Surface ...
Question: You want to paint each face of the pentagonal prism with a different color. How many people do you need if each person paints one side? Answer: A pentagonal prism has 7 faces: 5 rectangular faces around the sides and 2 pentagonal faces on the top and bottom. If you want each face to be painted by a different ...
Question: Among the numbers of 2.8, 2.3, 5, and 4.3, find the product of the smallest number and the largest number. Answer: The smallest number among 2.8, 2.3, 5, and 4.3 is 2.3, and the largest number is 5. To find the product of the smallest and largest numbers, we multiply them together: 2.3 * 5 = 11.5 Therefore...
Question: How many faces of a regular octahedron meet at one vertex? Answer: A regular octahedron has 8 faces, and it is one of the five Platonic solids. At each vertex of a regular octahedron, 4 faces meet.
Question: Find the number of four-digit integers that can be made by drawing 4 cards out of 5 cards with the numbers 0, 1, 2, 3, and 4 written on them. Answer: To form a four-digit integer, we need to select 4 cards out of the 5 available. However, we must be careful not to have the digit '0' as the first digit, as tha...
Question: Adding 305 to a number and then dividing it by 16 results in 31. Find the number. Answer: Let's call the number we are looking for "x". According to the problem, when we add 305 to x and then divide the result by 16, we get 31. We can write this as an equation: (x + 305) / 16 = 31 To find x, we need to sol...
Question: If all eight sides of a figure are the same in length and the perimeter of the figure is 23.6 centimeters (cm), what is the length of one side in cm (cm)? Answer: To find the length of one side of the figure, we can divide the total perimeter by the number of sides. Given that the perimeter is 23.6 cm and th...
Question: Hanbyul and Seulgi run around the park. During the same period, Hanbyul ran 1/100 of 10.2 kilometers (km), and Seulgi ran 100 meters (m). Who ran more? Answer: First, let's convert Hanbyul's distance into meters since Seulgi's distance is already given in meters. We know that 1 kilometer is equal to 1000 mete...
Question: How many faces are there in the pentahedron? Answer: A pentahedron is a polyhedron with five faces.
Question: There are 19 tangerines and some persimmons in the basket. How many persimmons are there if the total number of tangerines and persimmons is 37 in the basket? Answer: Let's denote the number of persimmons in the basket as P. According to the information given, the total number of tangerines and persimmons in...
Question: Yoongi wants to subtract 57 from a four-digit number. Yoongi has mistaken 9 for 6 in the unit place of a four-digit number. When the difference Yoongi gets is 1819, find the correct result. Answer: Let's denote the correct four-digit number as ABCD, where A, B, C, and D represent the thousands, hundreds, tens...
Question: When Hyemi went to the game room, she went at 3 kilometers per hour (km). When she came back from the game room, she went through the mart, so she came at a speed of 4 km per hour on a 2 km (km) longer road. If the total time to go and return took 4 hours, how many kilometers did she walk to the game room? An...
Question: If you put 12 apples in a box, you get 55 boxes. If you put 15 apples in each box, how many boxes will there be? Answer: If you put 12 apples in a box and you get 55 boxes, that means you have a total of 12 apples/box * 55 boxes = 660 apples. If you want to put 15 apples in each box instead, you would divide...
Question: Taehyung's uncle is 17 years older than Taehyung. Four years later, the sum of Taehyung's age and his uncle's age is 43 years old. How old is Taehyung this year? Answer: Let's denote Taehyung's current age as T. According to the information given, Taehyung's uncle is 17 years older than Taehyung, so his uncle...
Question: How many pairs of parallel faces are there in a cube? Answer: A cube has 3 pairs of parallel faces. Each pair consists of two faces that are opposite each other.
Question: You sold 1249 candies on Day 1. On Day 2, you sold 328 more candies than Day 1. On day 3, you sold 275 more candies than Day 2, leaving 367 left. How many candies were there at the beginning? Answer: Let's calculate the number of candies sold each day and then sum them up to find out the total number of candi...
Question: Each box contains 3 balls. If you have 2 boxes, what is the total number of balls? Answer: If each box contains 3 balls, and you have 2 boxes, then the total number of balls would be: 3 balls/box * 2 boxes = 6 balls So, you would have a total of 6 balls.
Question: I'm trying to seat three second-graders and two first-graders on five chairs in a row. Find the case where two first-graders are seated consecutively. Answer: To find a case where the two first-graders are seated consecutively, we can treat the two first-graders as a single unit since they must sit next to ea...
Question: If the length of one radius of a circle is 2, what is the length of the other radius? Answer: The length of the other radius of a circle is also 2. All radii of a circle are equal in length.
Question: There is a calculator that only works with four buttons: 2, 3, 7, and 9. When making a four-digit number on the calculator by pressing the button without duplication, find the second largest number that can be made. Answer: To find the second largest four-digit number that can be made with the digits 2, 3, 7,...
Question: It is said that 140 U.S. dollars can be exchanged for 158,760 Korean won. What is the exchange rate of Korean money to the United States' money? Answer: To find the exchange rate of Korean won to U.S. dollars, we divide the amount of Korean won by the amount of U.S. dollars. 158,760 Korean won / 140 U.S. dol...
Question: Find the multiples of 3 of the numbers whose hundreds are 7 and whose ones are 3. How many numbers are there? Answer: To find the multiples of 3 with hundreds digit 7 and ones digit 3, we need to consider numbers in the form of 7X3, where X can be any digit from 0 to 9 that makes the entire number a multiple ...
Question: There is the expression 691-6A7=4. Find the number that goes into A Answer: To find the value of A, we need to solve the equation: 691 - 6A7 = 4 First, let's rewrite the equation by expanding the term 6A7 as 600 + A*10 + 7: 691 - (600 + A*10 + 7) = 4 Now, let's simplify the equation: 691 - 600 - A*10 - 7...
Question: Heeju's school has 500 students. Among them, 289 students like ramen and 337 students like bread. If there are 56 students who do not like both ramen and bread, find how many students like both ramen and bread. Answer: To find out how many students like both ramen and bread, we can use the principle of inclus...
Question: You have a piece of paper in the shape of a triangle with an area of 46 square centimeters (cm2). If the base is 10 centimeters (cm), what is its height in centimeters (cm)? Answer: The area of a triangle is given by the formula: Area = (base * height) / 2 We are given the area (46 cm²) and the base (10 cm)...
Question: There are five numbers 1.4, 9/10, 1.1, 0.5, and 13/10. How many of these numbers are greater than 0.9? Answer: To determine how many of these numbers are greater than 0.9, we need to compare each number to 0.9. 1.4 is greater than 0.9. 9/10 is equal to 0.9, so it is not greater than 0.9. 1.1 is greater than ...
Question: You want to share 1/6 of 16 kilograms (kg) peanuts with your friends. If one person eats 4/15 kilograms (kg), how many people can eat? Answer: First, let's find out how many kilograms of peanuts you want to share. You have 16 kg of peanuts and you want to share 1/6 of that amount. 1/6 of 16 kg = 16 kg * (1/...
Question: Find the value of the smaller number when the difference between the two numbers is 28 and the larger number plus 13 is twice the smaller number plus 13. Answer: Let's denote the smaller number as S and the larger number as L. According to the given information, we have two equations: 1) The difference betw...
Question: 3 years ago, the sum of the ages of the mother and son was 49, and this year, when the mother is 4 times the age of the son, how old is the son this year? Answer: Let's denote the current age of the son as S and the current age of the mother as M. Three years ago, the son's age was S - 3 and the mother's age...
Question: Kyungsoo's group of students did the long jump. When Kyungsoo jumped 2.3 meters (m), Younghee jumped 9/10 meters (m), Jinju jumped 1.8 meters (m), and Chanho jumped 2.5 meters (m), who came second? Answer: To determine who came second, we need to compare the jump distances of all the students and rank them fr...
Question: There is a parallelogram that has a base of 3.6 and a height of 2.5 times the base. Find the area of this parallelogram. Answer: To find the area of a parallelogram, you use the formula: Area = base × height Given that the base of the parallelogram is 3.6 units and the height is 2.5 times the base, we first...
Question: At one Wang mathematical academy, 120 students took the A Mathematical Education Evaluation. If there were 36 more students who received certificates than those who did not receive certificates, how many students received certificates? Answer: Let's denote the number of students who received certificates as C...
Question: There are 28 erasers in total. Among them, Yeonju received 1/4 of the eraser and Minji received 3/7 of them. What is the number of remaining erasers? Answer: To find the number of remaining erasers, we first need to calculate how many erasers Yeonju and Minji received. Yeonju received 1/4 of the erasers: \( ...
Question: Horses, cows, pigs, sheep, rabbits, and squirrels entered the pen in this order. Which animal took 4th place? Answer: The fourth animal to enter the pen, according to the given order, is the sheep.
Question: If the coin's radius is 7 centimeters (cm), how many centimeters (cm) is the coin's diameter? Answer: The diameter of a circle is twice the radius. So, if the radius of the coin is 7 centimeters, the diameter would be: Diameter = 2 × Radius Diameter = 2 × 7 cm Diameter = 14 cm Therefore, the coin's diameter...
Question: He painted all the faces of a cube with an edge of 3 cm (cm) red. Then he cut this cube into 27 small cubes, each 1 cm (cm) long. How many of the small cubes have 3 faces painted red? Answer: When a larger cube is painted and then cut into smaller cubes, the only small cubes that will have three faces painted...