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આગળની સંખ્યા શોધો: 2, 6, 12, 20, 30, ?

A40
B36
C42
D44
Answer & Solution
Correct answer: C. 42
**તફાવત:** 4, 6, 8, 10 (2 થી વધે છે). આગળનો તફાવત = 12. તેથી 30 + 12 = 42. સમકક્ષ: n=1,2,3,... માટે n(n+1) જે 2, 6, 12, 20, 30, 42 આપે છે.
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