Find the missing term in the series below: 2, 6, 12, 20, ?, 42

A26

B32

C28

D30 ✓ Correct

Correct answer: (D) 30

Explanation

The missing term is 30.

Each term follows n x (n + 1) for n = 1, 2, 3, ...

Check : 1 x 2 = 2, 2 x 3 = 6, 3 x 4 = 12, 4 x 5 = 20.

For n = 5 : 5 x 6 = 30.

Check : n = 6 gives 6 x 7 = 42.

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