Question

fill in the blank to write this product as a factorial. 4·3·2·1 = ?!

Explanation:

Step1: Recall factorial definition

The factorial of a non - negative integer $n$, denoted by $n!$, is the product of all positive integers less than or equal to $n$. That is $n!=n\times(n - 1)\times\cdots\times1$.

Step2: Identify the number

In the product $4\times3\times2\times1$, the largest number in the product is 4. According to the factorial definition, $4!=4\times3\times2\times1$.

Answer:

4