Find $a,b,c$ such that $a!\times b!\times c!=d!$
58589
On the factorial equations $A! B! =C!$ and $A!B!C! = D!$
5789
$ d = \gcd(a,b)\Rightarrow\ \gcd(a/d,b/d) = 1$
120094
Prove, that for any A, B, C sets, $A\times (B\setminus C) = (A\times B)\setminus (A\times C)$ is true.
148668
How to show $A\times (B\cup C) = (A\times B)\cup (A\times C)$
125164
How to prove the existence of $b$ in $Q$ such that $a<b^2<c$ in $Q$?
79
Find $a$, $b$ and $c$ that satisfy the following equations
77902
If $A,B,$ and $C$ are sets, then $A\times(B-C)$ = $(A \times B)$ $-$ $(A \times C)$.
61103
Prove that $\mathbb{|Q| = |Q\times Q|}$
2289
Prove that if $\gcd( a, b ) = 1$ then $\gcd( ac, b ) = \gcd( c, b ) $
104124
Prove or disprove: $A-(B-C) = (A-B)-C$
114185
Existence of $x$ such that $2^x =a,3^x=b,5^x=c$ for some integers $a,b,c$
70278
$A\subseteq B\to C\setminus B\subseteq C\setminus A\,$ -- how to prove this?
75974
$\gcd(a,b)\!=\!1\!=\!\gcd(a,c)\Rightarrow\gcd(a,bc)\!=\!1$ [coprimes to $\,a\,$ are product closed]
27147
Proving $n! > n^3$ for all $n > a$
76823
Is it the case that for all sets $A, B, C,$ and $D$, $(A \times B) \cup (C \times D) = (A \cup B) \times (C \cup D)$?
63535
Prove that if $A – C = B – C$ and $A\cap C = B\cap C$ then $A = B$
119156
$(a,b)=d \overset{?}{\implies} (a^3,b^3)=d^3$