What will come in place of question mark (?) in the following number series?
1, 2, 6, 24, 120, ?, 5040
1
504
2
720
3
420
4
204
5
None of these
What will come in place of question mark (?) in the following number series?
1, 2, 6, 24, 120, ?, 5040
504
720
420
204
None of these