In the following number series, two numbers have been put within brackets. Study the series carefully and select the correct alternative with respect to the series.
1, 1, 2, 6, 24, (121), 720, (5040), 40320
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. The first bracketed number (from the left) is incorrect and the second is correct.
| Understanding |
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Given series: 1, 1, 2, 6, 24, (121), 720, (5040), 40320 The logic used here is: 1 × 1 = 1 1 × 2 = 2 2 × 3 = 6 6 × 4 = 24 24 × 5 = 120 120 × 6 = 720 720 × 7 = 5040 5040 × 8 = 40320 The first bracketed number (from the left) is incorrect and the second is correct. Hence, option 2 is the correct answer. |