Question

make 5 questions of odd one out 5'10'15'20

Answer 1

Hello dear,

Here 5 will be odd one out.

Because,

5 have two factors 5 and 1
(5*1 = 5 and 1*5 = 5)
and it is Prime number.

where as 10,15,20 are not prime numbers.

Hope it helps.