Multiple choice

Find the wrong number in the series given below. 729 730 734 771 1017 4142

  1. 730

  2. 734

  3. 771

  4. 1017

  5. 4142
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C Correct answer
Explanation

The series pattern is: +1³, +2³, +3³, +4³, +5³. Starting from 729: 729+1=730, 730+8=738 (not 734), 738+27=765, 765+64=829, 829+125=954. The number 771 breaks this pattern as 734+27=761, not 771. The pattern requires adding consecutive cubes.

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