Multiple choice

Find the wrong number in the following number series? 69988 11654 1944 324 54 9

  1. 69988

  2. 11654

  3. 1944

  4. 324

  5. 54
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A Correct answer
Explanation

Testing division by 6: 11654 × 6 = 69924, but the first term is 69988 (difference of 64). 1944 × 6 = 11664 (but we have 11654). 324 × 6 = 1944 ✓, 54 × 6 = 324 ✓, 9 × 6 = 54 ✓. The pattern of dividing by 6 works from 1944 onward, but breaks at 11654 and 69988. The first term 69988 should be 69924 to maintain the pattern.

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