Show that there is one person who knows everybody.
104700
suppose $n$ people are in a party and every two of them have exactly one common friends,prove that there is one who is friend to all.
87562
Reminding others of one’s favors for them
137915
"Each of them is" "Each of them are"
44943
The 3 different equals
45798
Show that all horses are of the same color.
58059
Every - mixing singular and plural in one sentence
98096
Group of $r$ people at least three people have the same birthday?
91980
Prove that f is one-to-one on D
111490
Proof that every number has at least one prime factor
98509
All Faces to Individual Objects
118133
What is the difference between "anyone" and "everyone" in this context
28733
Every Number is Describable?
129163
Showing that every positive integer can be represented in this form
122799
"I saw one of my classmates who was/were?"
108394
Proof of that every interval is connected
50135
A man who keeps his word
156602
what would you call a guy everybody picks on?