The H.C.F. of 2/3. 8/9. 64/81 and 10/27 is :

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1)

The H.C.F. of 2/3. 8/9. 64/81 and 10/27 is :

2)

The H.C.F. of 3666 and 3444 is :

3)

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.

4)

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 :

5)

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 :

6)

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 :

7)

Six bells commence tolling together and toll at intervals of 2, 4, 6, 8, 10 and 12 seconds respectively. In 30 minutes, how many times do they toll together ?

8)

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 :

9)

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 :

10)

The H.C.F. of 204, 1190 and 1445 is :

11)

A, B and C start at the same time in the same direction to run around a circular stadium. A completes a round in 2.ri2 seconds, B in 308 seconds and C in 198 seconds, all starting at the same point. After what time will they meet again at the starting noint ?

12)

252 can be expressed as a product of primes as ;

13)

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

14)

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

15)

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

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