Friday

July 25, 2014

July 25, 2014

Posted by **mychelle** on Saturday, November 27, 2010 at 10:27pm.

- algebra -
**drwls**, Saturday, November 27, 2010 at 10:50pmThe correct formula is n(n+1)/2, NOT t(n+1)/2

If that number is 325,

n(n+1) = 650, and so

n = 25

**Related Questions**

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

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

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

Math - Mark read that the ancient Greeks use to arrange pebbles to represent ...

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

Math - Hi! im looking to find relationships between sets of polygonal numbers. I...

maths - Using the following formula for a triangular number, verify that 1225 ...

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

Maths - Please Could someone tell me what: 1. A square number is 2. A cube ...

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