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Friday, 30 September 2016

Square and Triangular Number Puzzle

I have a puzzle for you which is very nice. 36 is a square number, it is 6 squared. It is also the 8th triangular number. Can you find another number which is a square and a triangular number. If other such numbers exist can you find the pattern behind them?

NB: The formula for the triangular number is x(x+1)/2.

The solution will be in the next post. Enjoy!

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