Question

What strategy am I suppose to use??

Answer 1

Just find a pattern. In this instance, every number increases by one less than the previous increase.

Explanation:

For example, 2 increases by 8 to 10. Then it increases by 7 to get to 17. Then it increases by 6, then by 5, and it will continue in that way for the next two, increasing by 4 to get 32, and then increasing by 3 to get to 35.

Answer 2

2,10,17,23,28,32,35

=> the next numbers are 28+4 = 32, and 32+3 = 35

a1 = 2

a2 = a1+8

a3 = a2+7

a4 = a3+6

a5 = a4+5

a6 = a5+4

a7 = a4+3