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5 values
sciq
sciq_4
What process refers to the changes that occur in populations of living organisms over time?
[ "spontaneous mutation", "adaptation", "variation", "evolution" ]
D
aqua_train
aqua_train_71358
The product of all the prime number less than or equal to 11 is
[ "A)10^1", "B)10^2", "C)10^3", "D)10^4", "E)10^5" ]
D
aqua_train
aqua_train_31744
Pipe A can fill a tank in 6 hours. Due to a leak at the bottom, it takes 12 hours for the pipe A to fill the tank. In what time can the leak alone empty the full tank?
[ "A)67", "B)88", "C)18", "D)26", "E)12" ]
E
aqua_train
aqua_train_43352
Albert invested amount of 8000 in a fixed deposit for 2 years at compound interest rate of 5 % per annum. How much Albert will get on the maturity of the fixed deposit
[ "A)Rs. 8510", "B)Rs. 8620", "C)Rs. 8730", "D)Rs. 8820", "E)None of these" ]
D
aqua_train
aqua_train_1574
A, B and C started a business with capitals of Rs.6000, Rs.8000, and Rs.10000 respectively. At the end of the year, the profit share of B is Rs1000. The difference between the profit shares of A and C is
[ "A)Rs. 400", "B)Rs. 450", "C)Rs. 500", "D)Rs. 550", "E)Rs. 650" ]
C
aqua_train
aqua_train_27770
if 85% of the population of an ant colony is red, and of these 45% are females, then what % of the total ant population are male red ants?
[ "A)46.75", "B)40", "C)33.66", "D)66.66", "E)66.86" ]
A
aqua_train
aqua_train_21802
Find the value of e from (14)^2 x 5^3 ÷ 568 = e.
[ "A)13.1", "B)43.1", "C)40.1", "D)23.1", "E)45.1" ]
B
aqua_train
aqua_train_57794
Rs.1500 is divided into two parts such that if one part is invested at 6% and the other at 5% the whole annual interest from both the sum is Rs.75. How much was lent at 5%?
[ "A)388", "B)1500", "C)277", "D)500", "E)271" ]
B
aqua_train
aqua_train_66078
The mean of 50 observations was 36. It was found later that an observation 48 was wrongly taken as 23. The corrected new mean is?
[ "A)36.7", "B)36.1", "C)36.5", "D)36.9", "E)36.3" ]
C
aqua_train
aqua_train_13229
The fourth proportional to 12, 14 and 18 is?
[ "A)twenty one", "B)66", "C)77", "D)88", "E)12" ]
A
science_train
science_train_2442
Question: Will these magnets attract or repel each other? Hints:
[ "repel", "attract" ]
B
aqua_train
aqua_train_80626
P and Q started a business investing Rs. 85,000 and Rs. 25,000 respectively. In what ratio the profit earned after 2 years be divided between P and Q respectively?
[ "A)17:6", "B)17:0", "C)17:4", "D)17:2", "E)17:5" ]
E
sciq
sciq_4
The addition of heat changes liquid water to what?
[ "rainwater", "ice", "distilled water", "water vapor" ]
D
sciq
sciq_4
Which has more electrons, neon or fluorine?
[ "the same", "fluorine", "neither", "neon" ]
D
aqua_train
aqua_train_46857
Walking at 8KMPH From Point R to Point railway station, mike will miss the train by 5 minutes. If he walks at 10KMPH he will reach the station by 5 minutes early.What is the distance between Point R to Railway station?
[ "A)A)9KM", "B)B)6.66KM", "C)C)7.25KM", "D)D)12.40KM", "E)E)13KM" ]
B
aqua_train
aqua_train_77081
The food in a camp lasts for 25 men for 55 days. If five more men join, how many days will the food last?
[ "A)80 days", "B)30 days", "C)46 days", "D)16 days", "E)15 days" ]
C
aqua_train
aqua_train_39603
A shopkeeper buys mangoes at the rate of 6 a rupee and sells them at 5 a rupee. Find his net profit or loss percent?
[ "A)34 %", "B)33 %", "C)20 %", "D)35 %", "E)30 %" ]
C
aqua_train
aqua_train_37832
The perimeter of a triangle is 28 cm and the inradius of the triangle is 2.5 cm. What is the area of the triangle
[ "A)72", "B)828", "C)729", "D)34", "E)35" ]
E
aqua_train
aqua_train_69785
In a is a positive integer smaller than 200 and (14a)/60 is an integer, then a has how many different positive prime factors?
[ "A)2", "B)3", "C)5", "D)6", "E)8" ]
B
sciq
sciq_4
Designed to exchange materials, what spongy structure consists of membranes and blood vessels from both mother and embryo?
[ "endometrium", "uterus", "umbilicus", "placenta" ]
D
aqua_train
aqua_train_93946
If x = 3z, where z is a prime number greater than 2, how many different positive even divisors does x have, including x?
[ "A)0", "B)1", "C)2", "D)3", "E)It cannot be determined from the information given" ]
A
sciq
sciq_4
Glands release what substance into the blood?
[ "enzymes", "toxins", "acids", "hormones" ]
D
aqua_train
aqua_train_82738
A class of 10 students is having an average age of 15, another group of 4 students whose average age is 12 has been added to them. What is the average of the new group formed?
[ "A)12", "B)13.4", "C)14.14", "D)15", "E)16.25" ]
C
aqua_train
aqua_train_2028
Sum of two numbers is 63. Their difference is 1/8 of their sum. their L.C.M is
[ "A)231", "B)153", "C)351", "D)345", "E)355" ]
C
mcq_train
mcq_train_53
Question: Which of the following statements on Latent Semantic Indexing (LSI) and Word Embeddings (WE) is false? Options: The dimensions of LSI can be interpreted as concepts, whereas those of WE cannot, LSI does not depend on the order of words in the document, whereas WE does, LSI is deterministic (given the dimensio...
[ "The dimensions of LSI can be interpreted as concepts", "whereas those of WE cannot", "LSI does not depend on the order of words in the document", "whereas WE does", "LSI is deterministic (given the dimension)", "whereas WE is not", "LSI does take into account the frequency of words in the documents", ...
D
aqua_train
aqua_train_39175
10 men can cut 10 trees in 2 hours. If 2men leave the job, how many trees will be cut in 3 hours?
[ "A)12", "B)15", "C)16", "D)18", "E)20" ]
A
aqua_train
aqua_train_72701
In an engineering class that contained 50 students, the final exam consisted of 2 questions. Three fifths of the students answered the first question correctly. If four fifths of the remainder answered the second question correctly, how many students answered both questions incorrectly?
[ "A)4", "B)6", "C)10", "D)12", "E)24" ]
A
sciq
sciq_4
What part of the sperm contains the genetic material?
[ "the \" body \"", "the \" tail \"", "the \" brain \"", "the \"head\"" ]
D
aqua_train
aqua_train_32370
Find the cost of fencing around a circular field of diameter 30 m at the rate of Rs.2 a meter?
[ "A)100.5", "B)188.5", "C)190.5", "D)168.5", "E)175.5" ]
B
aqua_train
aqua_train_20280
The speed of a boat in still water is 60kmph and the speed of the current is 30kmph. Find the speed downstream and upstream?
[ "A)40", "68 kmph", "B)40", "30 kmph", "C)90", "60 kmph", "D)40", "60 kmph", "E)90", "30 kmph" ]
E
aqua_train
aqua_train_30270
A person bought apples at 10 for $1 and sold them at 4 for $1. Find his gain or loss percent?
[ "A)150%", "B)-100%", "C)100%", "D)-50%", "E)50%" ]
A
aqua_train
aqua_train_60229
One out of every 500 light bulbs are defected. If 4 out of every 10 defected light bulbs have a broken glass and there are 20 broken glass light bulbs in the shipment, how many light bulbs total are there in the shipment?
[ "A)2,000", "B)5,000", "C)10,000", "D)25,000", "E)52,000" ]
D
aqua_train
aqua_train_36763
An bus covers a certain distance at a speed of 300 kmph in 5 hours. To cover the samedistance in 1hr, it must travel at a speed of?
[ "A)1520 km/hr", "B)1640 km/hr", "C)1656 km/hr", "D)1500 km/hr", "E)1520 km/hr" ]
D
aqua_train
aqua_train_31357
4 + 4 + 4 + 2 × 4^2 + 2 × 4^3 + 2 × 4^4 + 2 × 4^5 + 2 × 4^6 + 2 × 4^7 =
[ "A)4^12", "B)4^16", "C)4^7", "D)4^13", "E)4^10" ]
E
aqua_train
aqua_train_59466
If 288 is divided into four parts proportional to 5, 7, 4, 8 then the smallest part is :
[ "A)46", "B)44", "C)20", "D)48", "E)42" ]
D
science_train
science_train_1569
Question: Compare the average kinetic energies of the particles in each sample. Which sample has the higher temperature? Hints:
[ "sample A", "neither; the samples have the same temperature", "sample B" ]
A
aqua_train
aqua_train_14886
A certain musical scale has has 13 notes, each having a different frequency, measured in cycles per second. In the scale, the notes are ordered by increasing frequency, and the highest frequency is twice the lowest. For each of the 12 lower frequencies, the ratio of a frequency to the next higher frequency is a fixed c...
[ "A)330 * sqrt 2", "B)330 * sqrt (2^7)", "C)330 * sqrt (2^12)", "D)330 * the twelfth root of (2^7)", "E)330 * the seventh root of (2^12)" ]
A
aqua_train
aqua_train_25122
Sumitra has an average of 56% on her first 7 examinations. How much should she make on her eighth examination to obtain an average of 60% on 8 examinations?
[ "A)88%", "B)78%", "C)98%", "D)Cannot be determined", "E)None of these" ]
D
aqua_train
aqua_train_50045
The ratio of male to female in a class is 6:6. the career preference of the students in the class are to be represented in a circle graph. If the area of the graph allocated to each career preference is to be proportional to the number of students who have that career preference, how many degrees of the circle should b...
[ "A)a)180 degree", "B)b) 168 degree", "C)c)191 degree", "D)d)192 degree", "E)e)204 degree" ]
A
aqua_train
aqua_train_71612
How many integers between 1 and 1,800 are divisible by 20,30,40?
[ "A)14", "B)15", "C)16", "D)17", "E)18" ]
B
sciq
sciq_4
On insects, what are the openings on the sides of the abdomen that allows respiration to occur?
[ "gills", "wings", "chloroplasts", "spiracles" ]
D
ds_train
ds_train_1864
In a cross-section of a dicot stem, what is the correct sequence of tissues from the outside to the inside?
[ "A. Epidermis", "cortex", "phloem", "xylem", "pith\nB. Cortex", "epidermis", "pith", "phloem", "xylem\nC. Epidermis", "phloem", "cortex", "xylem", "pith\nD. Epidermis", "pith", "cortex", "xylem", "phloem" ]
A
aqua_train
aqua_train_18232
A, B and C completed a piece of work, A worked for 16 days, B for 9 days and C for 4 days. Their daily wages were in the ratio of 3:4:5. Find the daily wages of C, if their total earning was Rs.1480?
[ "A)Rs.80", "B)Rs.120", "C)Rs.71.15", "D)Rs.51.15", "E)Rs.180" ]
C
sciq
sciq_4
What is the force that pulls particles at the exposed surface of a liquid toward other liquid particles called?
[ "conservative tension", "shinking tension", "transfer tension", "surface tension" ]
D
aqua_train
aqua_train_82764
We bought a total of 90 books at the store. Math books cost $4 and history books cost $5. The total price was $397. How many math books did we buy?
[ "A)47", "B)53", "C)56", "D)61", "E)64" ]
B
aqua_train
aqua_train_8219
If x and y are positive integers such that (3x + 7y) is a multiple of 11, then which of the following will be divisible by 11 ?
[ "A)4x + 6y", "B)x + y + 4", "C)4x - 9y", "D)9x + 4y", "E)x + y - 4" ]
C
science_train
science_train_5536
Question: Which solution has a higher concentration of green particles? Hints:
[ "neither; their concentrations are the same", "Solution A", "Solution B" ]
C
ds_train
ds_train_1609
In immunohistochemistry, what is the primary function of the primary antibody?
[ "A. To detect the antigen and provide a signal\nB. To block non-specific binding sites\nC. To bind specifically to the target antigen\nD. To amplify the fluorescent signal" ]
C
aqua_train
aqua_train_45293
Let us say that a table tennis tournament was going on with knock out terms which means the one who loses the match is out of the tournament. 86 players took part in that tournament. How many matches were played?
[ "A)90 matches", "B)95 matches", "C)99 matches", "D)85 matches", "E)87 matches" ]
D
aqua_train
aqua_train_66942
Sixteen machines, each working at the same constant rate, together can complete a certain job in 12 days. How many additional machines, each working at the same constant rate, will be needed to complete the Job in 8 days?
[ "A)2", "B)3", "C)4", "D)6", "E)8" ]
E
aqua_train
aqua_train_44980
At a certain college, 60 percent of the total number of students are freshmen. If 40 percent of the fresh-men are enrolled in the school of liberal arts and, of these, 20 percent are psychology majors, what percent of the students at the college are freshmen psychology majors enrolled in the school of liberal arts?
[ "A)4%", "B)8%", "C)4.2%", "D)4.8%", "E)5%" ]
D
aqua_train
aqua_train_94524
John took a loan of Rs. 1500 with simple interest for as many years as the rate of interest. If he paid Rs. 540 as interest at the end of loan period, what was the rate of interest?
[ "A)2 %", "B)3 %", "C)4 %", "D)6 %", "E)None of these" ]
D
aqua_train
aqua_train_53016
Two pipes can fill a tank in 30 and 12 hours, while third pipe will make the tank empty in 20 hours. If all three pipes operate simultaneously. In how many hours the tank will be filled ?
[ "A)5 Hours", "B)7 Hours", "C)8 Hours", "D)9 Hours", "E)15 Hours" ]
E
aqua_train
aqua_train_53222
How much is 80% of 40 is greater than 4/5 of 25?
[ "A)229", "B)87", "C)26", "D)12", "E)667" ]
D
aqua_train
aqua_train_44779
A car takes 6 hours to cover a distance of 180 Km. how much should the speed in Kmph be maintained to cover the same direction in 3/2th of the previous time?
[ "A)50 Kmph", "B)20 Kmph", "C)65 Kmph", "D)70 Kmph", "E)None" ]
B
aqua_train
aqua_train_40945
1!+2!+3!+4!+5!+..100! is divided by 24. Find the remainder?
[ "A)2", "B)5", "C)9", "D)10", "E)12" ]
C
aqua_train
aqua_train_89232
8 3/4 + 7 2/17 - 9 1/15=?
[ "A)7 719/1020", "B)9 817/1020", "C)9 719/1020", "D)6 817/1020", "E)None of them" ]
D
aqua_train
aqua_train_40721
If each participant of a chess tournament plays exactly one game with each of the remaining participants, then 153 games will be played during the tournament. Find the number of participants.
[ "A)15", "B)16", "C)17", "D)18", "E)19" ]
D
aqua_train
aqua_train_91313
P, Q and R have Rs.4000 among themselves. R has two-thirds of the total amount with P and Q. Find the amount with R?
[ "A)Rs.3000", "B)Rs.1600", "C)Rs.2400", "D)Rs.4000", "E)None of these" ]
B
aqua_train
aqua_train_65336
The present ratio between the ages of Paul and Ben is 5:2. In 4 years time Paul will be 28. What is the present age of Ben?
[ "A)13", "B)12", "C)11", "D)15", "E)10" ]
B
aqua_train
aqua_train_54981
From a pack of 52 cards, one card is drawn. What is the probability that the card is a color of red?
[ "A)1/6", "B)2/2", "C)1/2", "D)8/2", "E)3/6" ]
C
science_train
science_train_5081
Question: Look at the models of molecules below. Select the elementary substance. Hints:
[ "bromine", "dichloromethane", "fluoromethane" ]
A
aqua_train
aqua_train_86105
In how many ways can two members be selected from a group of ten members?
[ "A)10C2", "B)10C8", "C)10C4", "D)10C3", "E)10C1" ]
A
aqua_train
aqua_train_44940
At Veridux Corporation, there are 250 employees. Of these, 90 are female, and the rest are males. There are a total of 40 managers, and the rest of the employees are associates. If there are a total of 160 male associates, how many female managers are there?
[ "A)40", "B)20", "C)25", "D)30", "E)35" ]
A
aqua_train
aqua_train_59031
A bag contains 6 red, 5 blue and 2 green balls. If 2 ballsare picked at random, what is the probability that both are red?
[ "A)5/21", "B)5/24", "C)5/26", "D)5/31", "E)6/29" ]
C
aqua_train
aqua_train_44986
Nine persons went to a hotel for taking their meals 8 of them spent Rs.12 each on their meals and the ninth spent Rs.8 more than the average expenditure of all the nine.What was the total money spent by them?
[ "A)Rs.117", "B)Rs.100", "C)Rs.110", "D)Rs.107", "E)Rs.98" ]
A
aqua_train
aqua_train_22108
On dividing 21 by a number, the quotient is 10 and the remainder is 1. Find the divisor.
[ "A)1", "B)2", "C)4", "D)6", "E)7" ]
B
aqua_train
aqua_train_772
A number when multiplied by 3 and then subtracted by 2 becomes the reverse of itself. Can you find out which smallest number is that?
[ "A)28", "B)11", "C)10", "D)35", "E)47" ]
A
aqua_train
aqua_train_96081
A man can row at 5 kmph in still water. If the velocity of current is 1 kmph and it takes him 2 hour to row to a place and come back, how far is the place?
[ "A)2.4 km", "B)4.8 km", "C)3.4 km", "D)4.4 km", "E)5.6 km" ]
B
aqua_train
aqua_train_27832
If the diagonal of a rectangle is 17cm long and its perimeter is 46 cm. Find the area of the rectangle.
[ "A)110", "B)120", "C)130", "D)140", "E)150" ]
B
aqua_train
aqua_train_9709
When a number is divided by 13, the remainder is 11. When the same number is divided by 17, then remainder is 9. What is the number ?
[ "A)349", "B)339", "C)400", "D)500", "E)600" ]
A
aqua_train
aqua_train_97389
There is 60 lit of milk and water in which milk forms 84%.Howmuch water must be added to this solution to make it solution in which milk forms 68%
[ "A)14.11", "B)19.75", "C)20.75", "D)21.75", "E)22.75" ]
A
sciq
sciq_4
What branch of biology studies animal behavior?
[ "embryology", "microbiology", "geology", "ethology" ]
D
aqua_train
aqua_train_93809
If a/b = 1/7, b/c = 3, c/d = 2/3, d/e = 2 and e/f = 1/2, then what is the value of abc/def ?
[ "A) 72/21", "B) 27/85", "C) 34/47", "D) 13/81", "E) 16/21" ]
E
aqua_train
aqua_train_83740
P and Q invested in a shop. The profits were divided in the ratio of 2 : 3 respectively. If P invested Rs. 40,000, the amount invested by Q is:
[ "A)35000", "B)40000", "C)50000", "D)60000", "E)None" ]
D
aqua_train
aqua_train_71936
How many three digit numbers contain the digit 5 at least once?
[ "A)52", "B)128", "C)252", "D)648", "E)900" ]
D
science_train
science_train_799
Question: Complete the sentence. The Motagua Fault formed at a () boundary. Hints:
[ "transform", "convergent", "divergent" ]
A
aqua_train
aqua_train_53926
Xavier starts from P towards Q at a speed of 50 kmph and after every 12 mins increases his speed by 10 kmph. If the distance between P and Q is 52km, then how much time does he take to cover the distance?
[ "A)40", "B)60", "C)48", "D)70", "E)80" ]
C
aqua_train
aqua_train_55023
A can do a piece of work in 4 days. B can do it in 6 days. With the assistance of C they completed the work in 2 days. Find in how many days can C alone do it?
[ "A)87 days", "B)12 days", "C)16 days", "D)19 days", "E)36 days" ]
B
aqua_train
aqua_train_77692
In the Land of Oz only one or two-letter words are used. The local language has 68 different letters. The parliament decided to forbid the use of the seventh letter. How many words have the people of Oz lost because of the prohibition?
[ "A)65", "B)66", "C)67", "D)131", "E)136" ]
E
science_train
science_train_4221
Question: Will these magnets attract or repel each other? Hints:
[ "repel", "attract" ]
B
aqua_train
aqua_train_57562
Two partners in a business (James and Kelly) invested $900 and $1600 in a business respectively. At the end of the year they made a profit of $950. Find share of each partner?
[ "A)$352,$657", "B)$392,$608", "C)$342,$408", "D)$342,$608", "E)$347,$608" ]
D
aqua_train
aqua_train_41689
The average (arithmetic mean) of 4 different integers is 70. If the largest integer is 90, what is the least possible value of the smallest integer?
[ "A)1", "B)19", "C)29", "D)13", "E)33" ]
D
aqua_train
aqua_train_74716
7 years ago, Paula was 3 times as old as Karl. In 2 years, Paula will be twice as old as Karl. What is the sum of their ages now?
[ "A)26", "B)32", "C)38", "D)44", "E)50" ]
E
aqua_train
aqua_train_86633
Car A runs at the speed of 33km/hr & reaches its destination in 7hr. Car B runs at the speed of 44 km/h & reaches its destination in 5h. What is the respective ratio of distances covered by Car A & Car B?
[ "A)20 : 23", "B)25 : 27", "C)21 : 20", "D)29 : 23", "E)24 : 25" ]
C
aqua_train
aqua_train_55827
One pipe can fill a tank four times as fast as another pipe. If together the two pipes can fill the tank in 40 minutes, then the slower pipe alone will be able to fill the tank in?
[ "A)100min", "B)150min", "C)200min", "D)250min", "E)300min" ]
C
aqua_train
aqua_train_8985
The measures of the 2 acute angles of a triangle are in the ratio of 3 : 7. What arethe measures of the 2 angles?
[ "A)20°", "B)70°", "C)110°", "D)63°", "E)140°" ]
D
sciq
sciq_4
What is the measure of an individual’s weight-to-height ratio called?
[ "body density index (bdi)", "body matter index (bmi)", "density index (di)", "body mass index (bmi)" ]
D
aqua_train
aqua_train_31053
Find the odd man out 2880, 490, 96, 24, 8, 4, 4
[ "A)96", "B)8", "C)24", "D)490", "E)4" ]
D
aqua_train
aqua_train_86970
How many halves are there in nine-fourth?
[ "A)8", "B)4.5", "C)3.2", "D)7", "E)3" ]
B
aqua_train
aqua_train_50923
A grocer has a sale of Rs. 6435, Rs. 6927, Rs. 6855, Rs. 7230 and Rs. 6562 for 5 consecutive months. How much sale must he have in the sixth month so that he gets an average sale of Rs. 7000?
[ "A)s. 4991", "B)s. 5991", "C)s. 6001", "D)s. 6991", "E)s. 7991" ]
E
aqua_train
aqua_train_23404
(0.0077)(3.6) / (0.04)(0.1)(0.007)=
[ "A)0.099", "B)0.0099", "C)9.9", "D)990", "E)99" ]
D
aqua_train
aqua_train_35411
A and B can do a piece of work in 7 days. With the help of C they finish the work in 5 days. C alone can do that piece of work in?
[ "A)76 days", "B)86 days", "C)30 days", "D)57 days", "E)46 days" ]
C
aqua_train
aqua_train_40310
Four car rental agencies A, B, C and D rented a plot for parking their cars during the night. A parked 15 cars for 12 days, B parked 12 cars for 20 days, C parked 18 cars for 18 days and D parked 16 cars for 15 days. If A paid Rs. 1350 as rent for parking his cars, what is the total rent paid by all the four agencies?
[ "A)2388", "B)7380", "C)1279", "D)6150", "E)2771" ]
B
aqua_train
aqua_train_81879
A man goes from A to B at a speed of 20 kmph and comes back to A at a speed of 30 kmph. Find his average speed for the entire journey?
[ "A)1", "B)24", "C)18", "D)11", "E)12" ]
B
science_train
science_train_2362
Question: Select the vertebrate. Hints:
[ "polar bear", "redback spider" ]
A
aqua_train
aqua_train_94537
Jill works as a waitress at the local diner where she earns an hourly wage of $10.00 per hour and a standard tip rate of 40% of the cost of the orders she serves. If she worked four 16-hour shifts this week and averaged $40 in orders per hour, how much did Jill earn this week?
[ "A)280", "B)300", "C)1664", "D)350", "E)400" ]
C
aqua_train
aqua_train_97083
Tea worth Rs.126 per kg are mixed with a third variety in the ratio 1: 1 : 2. If the mixture is worth Rs.143 per kg, the price of the third variety per kg will be
[ "A)Rs.165.50", "B)Rs.1700", "C)Rs. 175.50", "D)Rs. 180", "E)None" ]
A
aqua_train
aqua_train_31028
A and B go around a circular track of length 1500 m on a cycle at speeds of 36 kmph and 54 kmph. After how much time will they meet for the first time at the starting point?
[ "A)120 sec", "B)165 sec", "C)300 sec", "D)167 sec", "E)168 sec" ]
C
aqua_train
aqua_train_13276
If n is an integer, f(n) = f(n-1) - n and f(4)=15. What is the value of f(6)?
[ "A)4", "B)0", "C)1", "D)2", "E)24" ]
A