The difference between the greatest and least prime numbers which are less than 100 is:

The number between 4000 and 5000 that is divisible by each of 12, 18, 21 and 32 is 

The L.C.M. of two numbers is 1820 and their H.C.F. is 26. If one number is 130 then the other number is:

The HCF of two numbers 12906 and 14818 is 478. Their LCM is

The LCM of two numbers is 1920 and their HCF is 16. If one of the numbers is 128, find the other number.

If $$A={{2^7×3^7}}$$, $$B={{2^7×3^5}}$$ and $$C={{2^8×3^4}}$$, then what is the least common multiple of A, B and C?

Three bells ring at interval of 36 seconds, 40 seconds and 48 seconds respectively. They start ringing together at a par- ticular time They will ring to gether after every