Question

Find the next number
5,7,10,26,17,63,26

Answer 1

By observing alternates ,

7,26,63 ,

Next number is 252.

Explaination :

1. 7

2.7×4-2

3.26×4-1

4.63×4-0 = 242.

this explanation is correct.

Answer 2

124 



(2×2)+1=5
(2×2×2)-1=7
(3×3)+1=10
(3×3×3)-1=26
(4×4)+1=17
(4×4×4)-1=63
(5×5)+1=26
(5×5×5)-1 = 124