Answer :
The next number in the series is 120.
This is a factorial series. In a factorial series, each number is the product of the previous number and the position it holds in the sequence.
For example:
* The first number (1) is simply 1! (1 factorial).
* The second number (2) is 1 x 2! (2 factorial).
* The third number (6) is 2 x 3! (3 factorial), and so on.
Following this pattern, the fifth number in the series would be 4 x 4! (4 factorial), which is 4 x 24 = 120.
This is a factorial series. In a factorial series, each number is the product of the previous number and the position it holds in the sequence.
For example:
* The first number (1) is simply 1! (1 factorial).
* The second number (2) is 1 x 2! (2 factorial).
* The third number (6) is 2 x 3! (3 factorial), and so on.
Following this pattern, the fifth number in the series would be 4 x 4! (4 factorial), which is 4 x 24 = 120.