Question

For any positive integer n>1, n! represents the product of the 1st n positive integers. For instance, 3!=1*2*3=6. Which of the following is(are) equal to 10!/8! ?

1. 5! - 4! - 3!

2. 5!/4!

3. 15(3!)

Answer 1

10!/8! = 10*9=90

Answer 2

Now, which one do u think is equal to 90

Answer 3

3

Answer 4

Yep....... 15(3!)=90