(Discrete Math) I'm having a really hard time with this problem as I'm new to the subject. Any help is appreciated.
108746
Prove that there exist two integers such that i - j is divisible by n.
81267
A simple doubt in number theory problem.
136290
a mathematical problem on inequalities
7919
The pigeonhole principle - how to solve questions like that?
152333
A problem based on pigeonhole
15753
Solve the following equation in positive integers $x$ and $y$
114277
Proving in Discrete Structures Problem that $2^N = \binom{N}{0} + \binom{N}{1} + \binom{N}{2} + \dots + \binom{N}{N}$
11976
Help with a recurrence with even and odd terms
114256
More Generating Functions problems
53312
Multiplication principle and permutation
68882
Path to Combinatorics Problem [$1.11$]
95533
I need some help with a GCD and LCM's Problem
123808
How would I solve the following problem involving elementary matrices?
72065
What is the best way to solve discrete divide and conquer recurrences?
36362
What's wrong with my solution for the birthday problem?
123407
Combinatorics - binary - very interesting question
96949
Discrete probability problem: what is the probability that you will win the game?