mental ability question 3,7,11,13,.....
Hi,
It is a series of odd prime numbers. Prime numbers is a that numbers which is only divisible by itself and 1.
so next odd number in the number series which is divisible by only itself and 1 is 17. So the next number given series will be 17.
Hope it helps.
3+4= 7
7+4 = 11
11+2= 13
13+4 =17
17+4 = 21
21+2= 23 ....and so on.