If 21 cows eat as much as 15 buffaloes, how many cows will eat as much as 35 buffaloes?
(a) 45 
(b) 49
(c) 56 
(d) 54

45 cows can graze a field in 12 days. How many cows will graze the same field in 9 days? (a) 60 (b) 38 3/4 (c) 54 (d) 45

How many whole numbers are between 437 and 487? (a)50 (b)49 (c)51 (d)none of these

We wish to select 6 persons from 8, but if the person A is chosen, then B must be chosen. In how many ways can the selections be made? 15 (b) 22 (c) 7 (d) None of these

A number is as much greater than 31 as it is less than 91. The number is (a)46 (b) 56 (c)61 (d) 76

The following diagram is what a nurse saw on a patient's ECG trace, which measures the electrical impulse passed by the heart in one heartbeat. The first arrow on the left signifies the beginning of the beat and the second arrow on the right signifies the end of the beat How many beats per minute did the nurse find in this patient? (a) 100 (b) 75 (c) 60 (d) 54

6 dozen eggs are bought for Rs 108. How much will 108 eggs cost? (a) Rs 171 (b) Rs 162 (c) Rs 153 (d) Rs 180

If (-3)/7=x/(35), then x= (a) 15 (b) 21 (c) -15 (d) -21

A class has 175 students. The following data shows the number of students obtaining one or more subjects. Mathematics 100, Physics 70, Chemistry 40, Mathematics and Physics 30, Mathematics and Chemistry 28, Physics and Chemistry 23, Mathematics, Physics and Chemistry 18. How many students have offered Mathematics alone (a) 35 (c) 60 (b) 48 (d) 22

If 4/5 of a water tank is filled in 1 hour, how much time will be required to fill the rest of it? (a)20 minutes (b) 15 minutes (c)12 minutes (d) 10 minutes

Bacterial cell divides every one minute. It takes 15 minutes a cup to be one-fourth full. How much time will it take to fill the cup ? (a) 30 minutes (b) 45 minutes (c) 60 minutes (d) 17 minutes