whats the pattern of 7, 21,8, 72, 9?

NetherCraft 0

4 Answers

  • 3 x 7 = 21

    9 x 8 = 72

    if the pattern is to multiply successive integers (7,8,9…) by powers of 3, then the next multiplier would be 3 to the 3rd power, so:

    27 x 9 = 243

  • Seems like it alternates.

    The odd slots are filled with 7, 8, 9.

    The even slots are filled with (previous slot * 3), (previous slot * 3^2).

    So the next slot, which is even, should be (previous slot * 3^3), or (9 * 27), which is 243.

  • first term = 7

    second term = 7.3 = 21

    third term = 8

    fourth term = 8.3^2 = 8.9 = 72

    fifth term = 9

    sixth term = 9.3^3 = 9.27 = 243

    seventh term = 10 and next term may be 10.3^4 etc

  • No

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