is 6 and 9 are triangular number
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6 is a triangular number but 9 is not a triangular number.
i hope it helps u buddy ✌✌
i hope it helps u buddy ✌✌
amishathakur2504:
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6 is a triangular number but 7 seven is not ...
may this helps you
may this helps you
9 is not a triangular number
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