Thursday

April 24, 2014

April 24, 2014

Posted by **Jennifer** on Sunday, December 8, 2013 at 5:44pm.

- math -
**Steve**, Monday, December 9, 2013 at 12:10amthe layers are triangular numbers:

1,3,6,10, ... n(n+1)/2

The pyramid is pyramidal numbers:

1=1

1+3=4

1+3+6=10

...

1+3+...+n(n+1)/2 = n(n+1)(n+2)/6

Now just plug in n=10

**Related Questions**

math - Jimmy had a total of 163 apples and oranges. After selling 50% of all the...

Math - The question is: A Woman is selling an (X) amount of Oranges The first ...

algebra - mary went to the store for some fruit. The apples were $1.00 per pound...

Math - Sophia buys an eqaul number of oranges and pears for a party. The oranges...

maths - PLS HELP!!!! Some children were sharing oranges. If each child took 3 ...

Maths - Some children were sharing oranges. If each child took 3 oranges, there ...

math - a box contain 60 oranges.3/5 of the oranges were equally shared among 4 ...

Math - Oranges are on sale at $0.99 per pound. Either bought 3.25 pounds of ...

4th Grade Math - At Mrs. Livingston's favorite grocery store, oranges are sold ...

Math - Part 1- Mr. Santiago bought 10 crates of oranges. There were 50 oranges ...