1.

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

Answer»

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.



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