Find the wrong term in the given series. 125, 216, 343, 512, 729, 100

2025

Find the wrong term in the given series.

125, 216, 343, 512, 729, 100

  1. A.

    343

  2. B.

    729

  3. C.

    100

  4. D.

    125

Attempted by 1416 students.

Show answer & explanation

Correct answer: C

Key insight: The sequence lists consecutive cube numbers.

  • 125 = 5^3

  • 216 = 6^3

  • 343 = 7^3

  • 512 = 8^3

  • 729 = 9^3

  • 100 (given) should be 10^3 = 1000

Explanation: All given terms follow consecutive cubes from 5^3 to 9^3, so the sixth term should be 10^3 = 1000. The provided value 100 does not equal 10^3 and therefore breaks the pattern.

Conclusion: 100 is the wrong term; it should be 1000.

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