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MDCAT · Logical reasoning · Parcha original · Sample

Find the next number: 2, 6, 12, 20, 30, ?

  1. A. 36
  2. B. 40
  3. C. 42✓ Correct answer
  4. D. 48

Explanation

The gaps grow by 2 each time: +4, +6, +8, +10, so the next gap is +12 and the answer is 42. (Each term is n(n + 1): 1×2, 2×3, 3×4, …, 6×7 = 42.)

فرق ہر بار 2 بڑھتا ہے: +4، +6، +8، +10، اس لیے اگلا فرق +12 اور جواب 42 ہے۔ (ہر عدد n(n + 1) ہے: 6×7 = 42)

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