Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:
Yes SF, had it been a straight line, the answer is N!,i.e.,120..just because question says it to be a circular table, answer is (N-1)!,i.e, 24.
I hope below explanation helps
Case1: Straight table.
5 people can sit like this, the first seat can be occupied by 5 knights, to occupy next seat there are only 4 knights, for third seat there are only 3 & so on.Multiply them all as it is 'AND' case.
Case 2: Circular table
It is difficult point out which is the first seat in a circular table.So we assume any one seat to be a first seat and one knight sits there. Now we have 4 seats and 4 knights to be arranged.Applying same logic as above.
i.e, second seat can be occupied by any 4 remaining knights,next seat by any 3 and so on.