The smallest number which when diminished by 7, is divisible by 12. 16, 18, 21 and a is:
Four different electronic devices make a beep after every 30 minutes, 1 hour, 1.5 hourand 1 hour 45 minutes respectively. All the devices beeped together at 12 noon. They will again beep together at :
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.
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 :
The H.C.F. of 3666 and 3444 is :
The L.C.M. of 22, 54, 108, 135 and 198 is :
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 :
The H.C.F. of 2/3. 8/9. 64/81 and 10/27 is :
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 ?
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 H.C.F. of 204, 1190 and 1445 is :
Three numbers are in the ratio 1:2:3 and their H.C.F. is 12. 1 he numbers are :
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 ?
Which of the following is a pair of co-primes ?
252 can be expressed as a product of primes as ;