SOLUTION: 2,3,3,5,10,13,?,43,172,177 a)23 b)38 c)39 d)40

Algebra ->  Testmodule -> SOLUTION: 2,3,3,5,10,13,?,43,172,177 a)23 b)38 c)39 d)40       Log On


   

Question 1025980: 2,3,3,5,10,13,?,43,172,177
a)23
b)38
c)39
d)40
Answer by Edwin McCravy(20086) About Me  (Show Source):
You can put this solution on YOUR website!
Start with 2, add 1, multiply by 1, add 2, multiply by 2, etc.

    2
2+1=3
3×1=3
3+2=5
5×2=10
10+3=13
13×3=39
39+4=43
43×4=172
172+5=177

Edwin