Posted by **Keira** on Saturday, June 27, 2009 at 11:39am.

Math (Reimy) - Reiny, Thursday, June 25, 2009 at 4:46pm

You are welcome

Just as an afterthought...

There is also a set of numbers called the pyramidal numbers, they are ...

1 4 10 20 ....

Can you figure out the pattern?

(Let their name be a hint.)

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