Multiple choice

In the following number series one numbers is wrong. Find the wrong number ? 2, 10, 18, 54, 162, 486, 1458

  1. 10

  2. 54

  3. 162

  4. 486

  5. 2
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A Correct answer
Explanation

Pattern: ×3, ×3, ×3, ×3. Starting from 18: 18, 54, 162, 486, 1458. But the series shows 2, 10, 18... The term 10 breaks the geometric progression. If it were 6 instead of 10, the pattern 6, 18, 54, 162, 486, 1458 would work (each ×3). Therefore 10 is the wrong number.

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