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20 November, 07:26

Number that best completes sequence 3 9 4 5 25 20 21 441

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  1. 20 November, 09:13
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    The pattern is to square the number, then subtract 5, then add 1. And repeat.

    1) 3 x 3 = 9

    2) 9 - 5 = 4

    3) 4 + 1 = 5

    4) 5 x 5 = 25

    5) 25 - 5 = 20

    6) 20 + 1 = 21

    7) 21 x 21 = 441

    8) 441 - 5 = 436

    The answer is 436
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