How to find the nth Triangular Number

This video explains how to find the nth triangular number. Practice questions are at the end of the video. This is an updated version of our previous video.
For a refresher on triangular numbers see our video: • Triangular Numbers Exp...
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00:00 Introduction
00:28 How to find the nth triangular number
01:39 Formula for finding the nth triangular number
01:46 Example question
03:00 Practice questions
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