If A is out then B is out. If C is out then D is in. What can I deduce?
57977
Why can't A play against C or D?
51321
Prove that $A = B = C = D$
100844
How should I understand "$A$ unless $B$"?
47737
Find all the possible values of $(a,b,c,d)$.
77332
Extremely difficult logic question using conditional statement
77547
Find integers $a,b,c,d$ such that
26861
$a+b=c \times d$ and $a\times b = c + d$
80684
Counter example for $(A \times B) \cap (C \times D) = (A \cap C ) \times (B \cap D)$
118809
If $a$ divides $bc$ and $\gcd(a,b) = d$ then $\frac a d$ divides c
158355
If $A$ commutes with $B$ and $B$ commutes with $C$, then $A$ commutes with $C$
113211
Arithmetics of cardinalities: if $|A|=|C|$ and $|B|=|D|$ then $|A\times B|=|D\times C|$
37134
How can I solve this logic question using propositional logic (Natural deduction)?
83714
$A \in B$ vs. $A \subset B$ for proofs
138707
show that if $a | c$ and $b | c$, then $ab | c$ when $a$ is coprime to $b$.
151038
How to prove (A v B), (A → C), (B → D) therefore (C v D)
91285
Prove $a+b+c+d $ is composite
155592
Conditional conundrum