Pigeonhole Principle for numbers and their divisors within a set
39382
Examples of the Pigeonhole Principle
135698
Count subsets whose cardinalities are congruent to 0, 1 and 2 modulo 3 respectively
123341
Diophantine number has full measure but is meager
70327
the numer of partial function between two sets in combinatoric way
151935
Proving the predicate $\forall n \in \mathbb{N} , n \geq 2$ using the Pigeonhole principle
121366
Intervals and cardinality
7919
The pigeonhole principle - how to solve questions like that?
5215
Can the principle of inclusion/exclusion be used to count elements in the intersection of a sequence of sets?
116970
On the number divisors of a number
108922
Cardinality and infinite sets: naturals, integers, rationals, bijections
147496
Rules of thumb for divisibility
119891
Divisibility and the Fibonacci sequence
117658
A set with n elements has 2^n subsets
59073
Method for Counting the Divisors of a number
134539
Euclidean and induction with prime numbers
84751
How can it be possible to localize a ring at a set with zero divisors?
156660
The set of all strictly increasing sequences of natural numbers