The L.C.M. of 22, 54, 108, 135 and 198 is :

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1)

The L.C.M. of 22, 54, 108, 135 and 198 is :

2)

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

3)

Which of the following is a pair of co-primes ?

4)

H.C.F. of 4 x 27 x 3125, 8 x y x 25 x 7 & 16 x 81 x 5 x 11 x 49 is :

5)

Product, of two co-prime numbers is 117. Their L.C.M. should be :

6)

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 :

7)

Find the least number which when divided by 16, 18; 20 and 25 leaves 4 as remainder in each case, but when divided by 7 leaves no remainder.

8)

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 :

9)

The least rubber which is a perfect square and is divisible bv each of the numbers Jo, 20 and 24, is :

10)

The L.C.M. of two numbers is 45 times their H C.K. If one of the numbers is 125 and the sum of H.C.F. and L.C.M. is 1150, the other number is :

11)

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 :

12)

Which of the following has most number of divisors ?

13)

The maximum number of students among them 1001 pens and 910 pencils can be distributed in such a way that each student gets the same number of pens and same number of pencils is :

14)

The least number of five digits which is exactly divisible by 12, 15 and 18, is :

15)

Three numbers are in the ratio 1:2:3 and their H.C.F. is 12. 1 he numbers are :

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