Missing digits in 19!
Number Theory
Level
1
\[\large 19! = \overline{12164510{\color{blue}a}4{\color{blue}a}8832000} \]
Determine the digit \({\color{blue}a}\).
Note: \( 19 ! = 19 \times 18 \times 17 \times \cdots \times 2 \times 1 \)
by
Ossama Ismail