Multiple choice

Find the wrong number in the following number series. 7, 28, 98, 294, 735, 1470, 2205, 2200

  1. 98

  2. 294

  3. 1470

  4. 2200

  5. 2205
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Analyze the multipliers: 7×4=28, 28×3.5=98, 98×3=294, 294×2.5=735, 735×2=1470, 1470×1.5=2205, 2205×1=2205. The pattern multiplies by decreasing values: 4, 3.5, 3, 2.5, 2, 1.5, 1. However, 2200 doesn't fit - after 2205×1.5=2205, the next should be 2205×1=2205, not 2200. The number 2200 is wrong because it doesn't follow this pattern.

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