self Maths Puzzle

How to check any Number is a Prime or not?

Read Solution (Total 2)

self Other Question

There are 2 Candle of same heights. Both are lit at the same time.
They burn completely within 4 hours and 3 hours respectively.Both candles burn at constant speed.After so long, the height of the 1st candle will be twice the height of the 2nd candle.
How to convert Md5 hash into bash64?