Can the value of $(-9!)$ be found
108021
What does the factorial of a negative number signify?
33199
Least value of an Expression?
102968
How to find out if a binary number is zero
87843
Combinatorial proof that $\frac{({10!})!}{{10!}^{9!}}$ is an integer
21903
What is the difference between [0-9]+ and [0-9]++?
134495
What is wrong with \ifnum#1=0.09\relax?
115506
What's wrong with this demonstration? (1 = -1)
46401
Value of $\frac{\sqrt{10+\sqrt{1}}+\sqrt{10+\sqrt{2}}+\cdots+\sqrt{10+\sqrt{99}} }{\sqrt{10-\sqrt{1}}+\sqrt{10-\sqrt{2}}+\cdots+\sqrt{10-\sqrt{99}}}$
86935
Finding all the numbers that fit $x! + y! = z!$
126708
Finding the missing digits of $23!$
156702
Finding value of an expression
142151
Find the last two digits of $9^{{9}^{9}}$
137027
Find the value of $\sum_{n=0}^\infty\frac{1}{9n^2+9n+2}$
117380
Divisibility Rule for 9
286
Is it true that $0.999999999\ldots=1$?
90381
Concecutive last zeroes in expansion of $100!$
27742
What does "${-#*i}" != "$-" mean?