Thursday

November 27, 2014

November 27, 2014

Posted by **Bob** on Wednesday, January 30, 2008 at 10:49pm.

Anyone know how I can do that?

- Math -
**drwls**, Wednesday, January 30, 2008 at 11:23pm99th triangle number = N(N+1)/2 = 4950

Adding 100 to it gives you

4950 + 100 = 5050.

That happens to be the 100th triangle number:

100*101/2

**Answer this Question**

**Related Questions**

Math - I need help with making a formula..? This is what I put.. "The 100th ...

Math - What is the formula to find the 99th Triangular Number?

Math - A triangular number is a number that can be represented by dots arranged ...

Math - How can I explain how I figured out the 99th Triangular Number? I'd ...

Math - A triangular number is a number that can be represented by dots arranged ...

algebra - The formula t(n+1)over 2 will determine a triangular number, where n ...

Math - An unusual die has six faces labelled 1,2,3,5,7 9. If two of these dice ...

math - The triangular numbers are the numbers 1, 3, 6, 10, 15, . . .; the square...

MATH - The triangular numbers are the numbers 1, 3, 6, 10, 15, . . .; the square...

6th grade math - Having problems with surface area of a triangular prism. I know...