The least rubber which is a perfect square and is divisible bv each of the numbers Jo, 20 and 24, is :
A number a is said to be perfect if the sum of all its divisors (excluding n itself) is equal to n. An example of perfect number is :
The smallest number which when diminished by 7, is divisible by 12. 16, 18, 21 and a is:
252 can be expressed as a product of primes as :
The least number of five digits which is exactly divisible by 12, 15 and 18, is :
Three different containers contain 496 litres, 403 litres and 713 litres of mixtures of milk and water respectively. What biggest measure can measure all the different quantities exactly ?
The L.C.M. of 22, 54, 108, 135 and 198 is :
The sum of two numbers is 528 and their H .C.F. is 33. The number of pairs of numbers satisfying the above conditions is :
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 a 1073. The sum of the three numbers is :
The H.C.F. of two numbers is 23 and the other two factors of their L.C.M. are 13 and 14. The larger of the two numbers is :
Which of the following has most number of divisors ?
The H.C.F. and L.C.M of two numbers are 11 and 385 respectively. If one number lies between 75 and 125, then that number is :
Let the least number of six digits, which when divided by 4, 6, 10 and 15 leaves in each case the same remainder of 2, be N. The sum of the digits in N is :
252 can be expressed as a product of primes as ;
Product, of two co-prime numbers is 117. Their L.C.M. should be :
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