19fieldsm

0 Questions
1 Answers

+2

0

It is
(1=1
1+3=4
1+3+5=9)
1+3+5+7=16
1+3+5+7+9=25

...and so on. You are adding 2 to the last number in the addition part of the equation. Does that make sense?
-Meggy

19fieldsmFeb 28, 2014