Which number does NOT belong in the sequence?
2, 6, 12, 22, 30, 42
Show answer & explanation
Correct answer: B
Explanation
2 = 1 × 2
6 = 2 × 3
12 = 3 × 4
20 = 4 × 5 ← 22 should not be there.
30 = 5 × 6
42 = 6 × 7
So the correct order should be:
2, 6, 12, 20, 30, 42
Therefore, 22 does not appear in the sequence.