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  • Write down the first seven numbers that can be arranged as triangles

4. Write down the first seven numbers that can be arranged as triangles, e.g. 3, 6, ...

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best_answer

3, 6, 10, 15, 21, 28, 36.

Posted by

Pankaj Sanodiya

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3,6,9,5,10,15,7,14,21

Posted by

adjay

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