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3 February, 02:57

Find the missing number: 50,?, 155, 218,288

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  1. 3 February, 03:41
    0
    99

    Step-by-step explanation:

    50 = 7 (7) + 1

    155 = 7 (22) + 1

    218 = 7 (31) + 1

    288 = 7 (41) + 1

    Numbers inside ()

    7, X, 22, 31, 41

    X = 14

    Missing term = 7 (14) + 1 = 99
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