Multiple choice

Find the wrong number in the following number series. $6, 3, 4.5, 12.25, 39.375, 117.1875$

  1. $12.25$
  2. $4.5$
  3. $39.375$
  4. $6$

  5. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Pattern: ×0.5, ×1.5, ×2.5, ×3.5, ×4.5. Starting: 6×0.5=3 ✓, 3×1.5=4.5 ✓, 4.5×2.5=11.25 ✗ (given 12.25). Continuing correctly: 11.25×3.5=39.375 ✓, 39.375×4.5=177.1875 (not 117.1875 - another error). The first error is 12.25.

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