Multiple choice

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)

  1. The first bracketed number (from the left) is correct and the second is incorrect.

  2. The first bracketed number (from the left) is incorrect and the second is correct.

  3. Both the bracketed numbers are incorrect.

  4. Both the bracketed numbers are correct.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The series is factorials: 1x1=1, 1x2=2, 2x3=6, 6x4=24, 24x5=120, 120x6=720, 720x7=5040, 5040x8=40320. So 121 is incorrect (should be 120) and 5040 is correct.

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