Question
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Answer (Detailed Solution Below)
Option 1 : 42
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Detailed Solution
सही उत्तर 42 है।
Key Points
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prepsnap.in • Part -AQuestion:
Find the missing number in the series: 2, 6, 12, 20, 30, ? / श्रृंखला में लुप्त संख्या ज्ञात कीजिए: 2, 6, 12, 20, 30, ?
1.
42
2.
36
3.
40
4.
44
Correct Answer: 42
The successive differences are 4, 6, 8, 10, increasing by 2 each time, so the next difference is 12 and 30 + 12 = 42. The terms are also n(n+1): 1×2, 2×3, 3×4, 4×5, 5×6, 6×7 = 42. / क्रमिक अंतर 4, 6, 8, 10 हैं, हर बार 2 बढ़ रहे हैं, अतः अगला अंतर 12 होगा और 30 + 12 = 42। पद n(n+1) भी हैं: 1×2, 2×3, 3×4, 4×5, 5×6, 6×7 = 42।
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