Question

Find the next number of sequence and explain please 8,5,9,15,?​

Answer 1

Answer:

Take the difference between the numbers and examine the generated sequence of three numbers:

8-5=3

14-8=6

26-14=12

It seems that the difference doubles every time, so the next differences are 24, 48, 96, ...

Thus the continuation of the sequence is:

5,8,14,26,50,98,194...

where the difference doubles every time.

Answer 2

$Sequences \: are \: as \: Follows :$

$1) \: 8 - 5 = 3$

$2) \: 5 - 9 = - 4$

$3) \: 9 - 15 = - 6$

$Sequences \: are \: 3 ,- 4 ,\: - 6$

$So it will be \: + , \: - , \: - \: , +$

$= 15 + 7$

$= 22$

$= 8,5,9,15,22$