Question

15,29,56,108,205,400, find the next number

Answer 1

The answer is 768

This is how i got the answer.

1. 15
2.(15-0.5) ×2=29
3 .(29-1) ×2=56
4 .(56-2) ×2=108
5 .(108-4) ×2=208
6 . (208-8)×2=400
7 .(400-16)×2=768

Answer 2

the answer of this question is this way

1 x 15 - 0 x 0 = 15 

2 x 15 - 1 x 1 = 29

4 x 15 - 2 x 2 = 56

8 x 15 - 3 x 4 = 108

16 x 15 - 4 x 8 = 208

32 x 15 - 5 x 16 = 400

64 x 15 - 6 x 32 = 768

 solution is 768.