Series pattern 2 x 12, 2 x 22, 2 x 32, 2 x 42, 2 x 52, 2 x 62 ∴ Missing term = 2 x 42 = 32

2, 8, 18,?, 50, 72

Correct Answer: 32

Explanation:

Series pattern
2 x 1², 2 x 2², 2 x 3², 2 x 4², 2 x 5², 2 x 6²
∴ Missing term = 2 x 4² = 32

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