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16 March, 22:24

Find the missing number in the following sequence 21,3,42,_84,12

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  1. 16 March, 22:53
    0
    9

    Step-by-step explanation:

    21/7=3

    21*2=42

    42/7=9

    42*2=84

    84/7=12

    etc.
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