Question

15. 31, 29, 24, 22, 17, _
what number should come
next?
​

Answer 1

answer is 15.............

Answer 2

Answer:

31-29=2

29-24=5

24-22=2

22-17=5

there is a sequence of difference by 2 and 5

and at last

17-2=15

THE NEXT NUMBER IS 15