Question:
Which number will come next in the series: 2, 6, 12, 20, 30, ?
श्रृंखला में आगे कौन सी संख्या आएगी: 2, 6, 12, 20, 30, ?
Options:
- a) 40
- b) 42
- c) 44
- d) 46
- a) 40
- b) 42
- c) 44
- d) 46
correct answer : b)
Explanation:
Pattern: 1×2=2, 2×3=6, 3×4=12, 4×5=20, 5×6=30, 6×7=42. Each term is n×(n+1). So next term = 6×7 = 42.
पैटर्न: 1×2=2, 2×3=6, 3×4=12, 4×5=20, 5×6=30, 6×7=42। प्रत्येक पद n×(n+1) है। अगला पद = 6×7 = 42।