Why is 0 factorial is equal to 1 ??
2959
Prove $0! = 1$ from first principles
20611
Inverse of a factorial
21665
why division by zero is not possible
55718
Is zero odd or even?
16264
Why does $x$ divided by zero not equal $x$?
32454
Why does the division of two integers return 0.0 in Java?
11459
Dividing 1/n always returns 0.0
77764
Is "$a + 0i$" in every way equal to just "$a$"?
157954
How many digits does the integer zero have?
43499
Repeatedly taking differences on a polynomial yields the factorial of its degree?
39459
Why is '' > 0 True in Python 2?
14540
Any shortcut to calculate factorial of a number (Without calculator or n to 1)?
17963
I have learned that 1/0 is infinity, why isn't it minus infinity?
31954
Why this proof $0=1$ is wrong?(breakfast joke)
34374
Simplifying factorials: $\frac{(n-1)!}{(n-2)!}$
148663
math.random, only generating a 0?
126184
Integer division always zero