If 1=5, 2=25, 3=125, 4=625 then 5=??

There are two ways to look at this puzzle: 1) since 1=5 so 5=1 2) This is a series which means x=5^x i.e. 5=3125 so its up to you which answer you want to pick..

Answer is 1

very easy question though.

3125 because the series is in sequence of multiples of 5.