Multiple choice

In the following number series, a wrong number is given. Find out the wrong number. 2, 9, 30, 105, 436, 2196

  1. 2196

  2. 9

  3. 30

  4. 436

  5. 105
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A Correct answer
Explanation

Pattern: multiply by an increasing number and add an increasing constant. 2 × 4.5 + 0 = 9; 9 × 3.33 + 3 = 30; 30 × 3.5 + 15 = 105; 105 × 4.15 + 31 = 436 (approx). Following this, 436 × 5.04 + 63 should give about 1909.75, but the series shows 2196, which breaks the pattern.

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