A number is such that when you add its factorial to the number itself, the result is 726. Find the number.
Show answer & explanation
Correct answer: D
Explanation
Given:
x + x! = 726
Formula:
Factorial: x! = 1 × 2 × 3 × … × x
6! = 720
x + x! = 6 + 720 = 726
Number = 6