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January 28, 2015

January 28, 2015

Posted by **Bob** on Wednesday, January 30, 2008 at 12:25am.

This is what I put..

"The 100th Triangular Number is 5,050. I found this by adding 100 to the value of the 99th Triangular Number. The 99th Triangular Number is 4,950. The formula I used to find it is..."

Help?

- Math -
**drwls**, Wednesday, January 30, 2008 at 1:24amI provided the formula in response to a previous post about triangle numbers.

Once again, it is N(N+1)/2

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