Multiple choice

Find the wrong number in following number series. 1 2 4.5 11 30 92.5 329

  1. 92.5

  2. 4.5

  3. 11

  4. 2

  5. 30
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Pattern: ×1, ×2, ×2.5, ×3, ×3.5, ×4. Check: 1×1=1, 1×2=2, 2×2.5=5 (not 4.5), 5×3=15 (not 11), etc. The pattern doesn't fit. Another pattern: differences are 1, 2.5, 6.5, 19, 62.5. The correct term should be 93 (30×3.5+7.5). 92.5 breaks the pattern.

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