1). 212). 123). 304). 42

1.	1). 212). 123). 304). 42
Answer» As per the series given in the question, it is CLEAR that it follows a PATTERN: 3 × 4 = 12 4 × 5 = 20 ≠ 21 5 × 6 = 30 6 × 7 = 42 7 × 8 = 56 12, 30, 42, 56 all these FOLLOW the pattern, except 21. Hence, 21 is incorrect answer.

Answer»

As per the series given in the question, it is CLEAR that it follows a PATTERN:

3 × 4 = 12

4 × 5 = 20 ≠ 21

5 × 6 = 30

6 × 7 = 42

7 × 8 = 56

12, 30, 42, 56 all these FOLLOW the pattern, except 21. Hence, 21 is incorrect answer.

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