What happens when you multiply the triangular numbers by 6 and add 1?

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Maths Class 6 Maths 230 views Apr 04, 2026 Reviewed & updated Sep 17, 2026
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What happens when you multiply the triangular numbers by 6 and add 1? Class 6

Question 1.

What happens when you multiply the triangular numbers by 6 and add 1? Which sequence do you get? Can you explain it with a picture? Class 6

Solution:

We get the sequence 7, 19, 37, 61, 91, ...

It is a sequence of hexagonal numbers.

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