Trollathon #1.10 : Fifth Answer?

Level 3

Find the fifth answer.


The answer is 41616.

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1 solution

Zi Song Yeoh
Apr 2, 2014

The picture of a triangle and a square. Hmmmmmm, what could it be. The answer is triangular square number.

So, the problem asked for the fifth triangular square number, which is 41616 \boxed{41616} .

BEST QUESTION EVAAAAAAAAAAAAAAAAAAAAAAAA

Pi Han Goh - 7 years, 2 months ago

What is a fifth triangular square number ?

Ameya Salankar - 7 years, 2 months ago

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Triangular number: Number of the form of n(n+1)/2

Square number: Number of the form n²

Just combine both.

Eric Hernandez - 6 years, 10 months ago

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