Question

you have a 4x4 checkerboard (with 16 squares). You put one penny on the first square, then 2 pennies on the next square then 22 pennies on the third square and so on until there are pennies on all the squares. How many pennies are on the 15th square?

Answer 1

I believe the answer is 330 pennies.

Explanation:

since the pattern is adding 22 each time, do 22 x 15 and you get 330.