Multiple choice

Find the wrong number in the following number series. 13, 20, 48, 112, 237, 453, 796

  1. 20

  2. 237

  3. 796

  4. 112

  5. 48
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A Correct answer
Explanation

Check the pattern of differences: 20-13=7, 48-20=28, 112-48=64, 237-112=125, 453-237=216, 796-453=343. These should follow the pattern 1³=1, 2³=8, 3³=27, 4³=64, 5³=125, 6³=216. The first difference 7 doesn't fit - it should be 1 (or 20 should be 14 to make difference 1). Since 20 doesn't fit the cubic pattern, it's the wrong number.

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