Multiple choice

Directions: The following number series contains a wrong number. Find out the wrong number. 3, 15, 25, 100, 105, 525, 530

  1. 15

  2. 25

  3. 100

  4. 105
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B Correct answer
AI explanation

The pattern alternates between multiplying by 5 and subtracting 5. Multiplying 3 by 5 gives 15, subtracting 5 from 15 gives 10, multiplying 10 by 5 gives 50, subtracting 5 gives 45, multiplying 45 by 5 gives 225, and subtracting 5 gives 220. Since the series is 3, 15, 25, 100, 105, 525, 530, the number 25 does not fit the pattern.

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