alleryFind the next number in the series: 2, 6, 12, 20, 30, ?
A36
B42
C44
D40
Answer & Solution
Correct answer: B. 42
Differences are 4, 6, 8, 10, so the next difference is 12: $30 + 12 = 42$.
(General term $n(n+1)$.)
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