Question

What will be the next number in the series 9,8,10,17,31...?

Answer 1

9  8  10   17     31
 -1  2     7    14 
     3   5    7      9

so 14+9 =23 
       23+31=54ans

Answer 2

Answer:

69

Step-by-step explanation:

10 = 9.1+1

17= 8.2+1

31 = 10.3+1

the next term is-

17*4+1= 69