A child is creating a pyramid with building blocks. The top three levels include 4 blocks, 10 blocks, and 16 blocks. How many blocks would be needed for a pyramid 25 levels tall? Use complete sentences to explain how a sum of an arithmetic series was applied?

Question

anonymous · Answer

levels of the pyramid: (each increases by 6 blocks
4
10
16
22
28
.. continue until you have all 25 levels, (number one is 4... number two is 10...)
Then add up all the numbers.