Owen was stacking popcorn balls on a table. He put sixteen balls on the table. He added three more layers. Each layer had four fewer balls than the previous layer. How many popcorn balls in all did Owen put on the table?

Answer 1

4
8
12
16

What is the total?

Answer 2

40 popcorn balls? I am right i think.

Answer 3

Right.

Answer 4

Thanks

Answer 5

You're welcome.