Question

Will get a MEDAL AND A FAN!

Answer 1

A child is creating a pyramid with building blocks. The top three levels include 4 blocks, 10 blocks, and 16 blocks.

Part 1: How many blocks would be needed for a pyramid 25 levels tall?

Part 2: Use complete sentences to explain how a sum of an arithmetic series was applied.

Answer 2

@ankit042 do you know how to do this?

Answer 3

Blocks at each level are in Arithmetic series with a0=4 and d =6

Answer 4

@AwesomeB can you proceed from here?

Answer 5

i don't get this :(

Answer 6

level 1 # blocks 4
level 2 # blocks 4+6
level 3 # blocks 4+2*6
.
..
level n #blocks 4+(n-1)6

Answer 7

4 + 6(n-1)


25th level =148

Answer 8

yes!

Answer 9

But part 1 asks you to sum blocks in all the level

Answer 10

so 1900?

Answer 11

yes 1900 is correct

Answer 12

and part2 ?

Answer 13

you have to prove how sum of arithmetic series is calculated