Wrong Number in Series

CMAT 2021 · Logical Reasoning · Easy · Logical Reasoning

Find the wrong number in this sequence: 72, 70, 67, 65, 58, 52, 45

  1. A.

    58

  2. B.

    65

  3. C.

    52

  4. D.

    70

Answer

B

Explanation

The standard decreasing pattern subtracts increasing integers: 72−2=7072 - 2 = 70 70−3=6770 - 3 = 67 67−4=6367 - 4 = 63 (instead of 65) 63−5=5863 - 5 = 58 58−6=5258 - 6 = 52 52−7=4552 - 7 = 45 Hence, 65 is the wrong term in the sequence.

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