Multiple choice

In the following number series one number is wrong. Find that wrong number. 11 30 87 256 771 2510

  1. 30

  2. 87

  3. 771

  4. 256

  5. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Series: 11, 30, 87, 256, 771, 2510. Pattern: ×3 - 3, ×3 - 3, ×3 - 3... Let's verify: 11×3-3=30✓, 30×3-3=87✓, 87×3-3=258 (but we have 256), 256×3-3=765 (but we have 771), 771×3-3=2310 (but we have 2510). So 256 breaks the consistent ×3 - 3 pattern. Option D (256) is correct as the wrong number.

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