Multiple choice

Find the wrong number in the given series: $10, 13, 234, 681, 997$

  1. $234$
  2. $13$
  3. $681$
  4. $10$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Series: 10, 13, 234, 681, 997. Differences: 3, 221, 447, 316 - no clear pattern. Last digits: 0, 3, 4, 1, 7. 681 ending in 1 is odd among numbers ending in 0,3,4,7. This is weak reasoning but 681 may be the intended answer due to last digit pattern.

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