The 100th pyramidal number is 338,350. that would make quite a stack of basketballs! What number must you add to get 338,350 to the 101st pyramidal number?

Question

Mathematics

Dario Crane

4 May, 14:52

The 100th pyramidal number is 338,350. that would make quite a stack of basketballs! What number must you add to get 338,350 to the 101st pyramidal number?

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Answers (1)

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Anna Morrison · Answer 1

Lets look a pyramid numbers

we have

1st=1

2nd=2

3rd=6

we notice that we jsut add the previous number on

so 1st=1

2nd=1+1

3rd=1+2+3

4th=1+2+3+4

so therefor to get from 100th to 101th, just add 101