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28 October, 14:23

Next number in sequence patter 7, 21, 8, 72, 9

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  1. 28 October, 17:45
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    The next number would be 243.

    3 x 7 = 21

    9 x 8 = 72

    _ x 9 = __

    In this pattern, the second number seems to be consecutive integers. The first number seems to be multiples of 3. 3^1 is 3, and 3^2 is 9, so the next number would have to be 3^3 times 9. This would be 27 x 9 = 243.
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