A, B and C start at the same time in the same direction to run around a circular stadium. A completes a round in 252 seconds, B in 308 seconds and c in 198 seconds, all starting at the same point. After what time will they again at the starting point ?

The ratio of two numbers is 3 : 4 and their H.C.F. is 4. Their L.C.M. is:

The least number which should be added to 2497 so that the sum is exactly divisible by 5, 6, 4 and 3 is:

Which of the following fraction is the largest ?

The least number, which when divided by 12, 15, 20 and 54 leaves in each case a remainder of 8 is:

The L.C.M. of two numbers is 48. The numbers are in the ratio 2 : 3. Then sum of the number is:

The greatest number of four digits which is divisible by 15, 25, 40 and 75 is:

The greatest possible length which can be used to measure exactly the lengths 7 m, 3 m 85 cm, 12 m 95 cm is:

The least multiple of 7, which leaves a remainder of 4, when divided by 6, 9, 15 and 18 is:

Which of the following has the most number of divisors?

The smallest number which when diminished by 7, is divisible 12, 16, 18, 21 and 28 is:

252 can be expressed as a product of primes as:

Find the greatest number that will divide 43, 91 and 183 so as to leave the same remainder in each case.

The G.C.D. of 1.08, 0.36 and 0.9 is:

If the sum of two numbers is 55 and the H.C.F. and L.C.M. of these numbers are 5 and 120 respectively, then the sum of the reciprocals of the numbers is equal to:

Let N be the greatest number that will divide 1305, 4665 and 6905, leaving the same remainder in each case. Then sum of the digits in N is:

The least number, which when divided by 12, 15, 20 and 54 leaves in each case a remainder of 8 is:

The H.C.F. of 9/10,12/25,18/35and 21/40 is:

The least multiple of 7, which leaves a remainder of 4, when divided by 6, 9, 15 and 18 is:

The product of two numbers is 2028 and their H.C.F. is 13. The number of such pairs is:

Find the greatest number that will divide 43, 91 and 183 so as to leave the same remainder in each case.

The H.C.F. of two numbers is 11 and their L.C.M. is 7700. If one of the numbers is 275, then the other is:

What will be the least number which when doubled will be exactly divisible by 12, 18, 21 and 30?

The product of two numbers is 4107. If the H.C.F. of these numbers is 37, then the greater number is:

Find the highest common factor of 36 and 84.

Find the greatest number that will divide 43, 91 and 183 so as to leave the same remainder in each case.

The least number which when divided by 5, 6 , 7 and 8 leaves a remainder 3, but when divided by 9 leaves no remainder, is:

Which of the following has the most number of divisors?

Three numbers which are co-prime to each other are such that the product of the first two is 551 and that of the last two is 1073. The sum of the three numbers is:

The product of two numbers is 4107. If the H.C.F. of these numbers is 37, then the greater number is: