Question

What number is equivalent to the following expression 4!3! (I have no clue what this is)

A 5040
B 144
C 572
D (this one is not the correct answer.) 479,001,600

Answer 1

B 144
(Its 4*3*2*1*3*2*1=144)

Answer 2

B 144

Explanation:

In Math, the exclamation mark is called factorial. The factorial of a number n is the product of all integers less than or equal to n but greater than or equal to 1. For example, the factorial of 5 is 5! = 5*4*3*2*1

With this, 4! = 4*3*2*1 and 3! = 3*2*1

Therefore, 4!3! = 4! *3! = 4*3*2*1*3*2*1 = 144