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    In the following question, select the missing number from the given series.700, 697, 688, 661, 580, ?
    Question

    In the following question, select the missing number from the given series.
    700, 697, 688, 661, 580, ?

    A.

    338

    B.

    350

    C.

    340

    D.

    337

    Correct option is D

    Given700, 697, 688,661, 580, ?
    Logic: Difference is multiply by 3 is each time.
    700 - 697 = 3
    697 - 688 = 9
    688 - 661 = 27
    661 - 580 = 81
    Observing the pattern:
    3 × 3 = 9
    9 × 3 = 27
    27 × 3 = 81
    The difference is multiplied by 3 each time.
    Now, continue the pattern:
    81 × 3 = 243
    Find the missing number:
    580 - 243 = 337
    The missing term is 337.
    Thus, correct option is (d).

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