Multiple choice

Find the wrong number in the following number series- 960 839 758 709 688 675

  1. 839

  2. 960

  3. 688

  4. 675

  5. 758
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C Correct answer
Explanation

Analyze the differences: 960-839=121 (11²), 839-758=81 (9²), 758-709=49 (7²). The pattern is squares of odd numbers in descending order: 11², 9², 7², 5², 3². Next difference should be 25 (5²), so 709 - 25 = 684, not 688. The number 688 is wrong.

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