Multiple choice

Directions: In the given series only one number is wrong . Find out the wrong number. 8, 56, 336, 1680, 6520, 20160, 40320

  1. 6520

  2. 1680

  3. 336

  4. 56

  5. None of these
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A Correct answer
Explanation

The pattern is multiplication by 7, 6, 5, 4, 3, 2. 8*7=56, 56*6=336, 336*5=1680, 1680*4=6720. The term 6520 is incorrect; it should be 6720.

AI explanation

The series follows a pattern of progressively multiplying by decreasing integers: 8 * 7 = 56, 56 * 6 = 336, 336 * 5 = 1680, and 1680 * 4 = 6720. Continuing this established logic, the next multiplication steps are 6720 * 3 = 20160 and 20160 * 2 = 40320. Since the fifth term deviates from the pattern by providing 6520 instead of 6720, it is the wrong number.

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