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New posts in problem-solving
IMO 2013 Problem 6
number-theory
contest-math
problem-solving
combinatorial-geometry
Proving that $T$:$(x_1,...,x_n) \rightarrow (\frac {x_1+x_2}{2},\frac {x_2+x_3}{2},...,\frac {x_n+x_1}{2})$ leads to nonintegral components
linear-algebra
number-theory
algorithms
problem-solving
integer-lattices
Find all the integer pairs $(x, y)$ which satisfy the equation $x^5-y^5=16xy$
number-theory
inequality
contest-math
problem-solving
intuition
Zombie Survival: What is the optimal way to place seven entities on an infinite grid to reduce number of adjacent pairs?
recreational-mathematics
problem-solving
Proving a number defined by a sequence is a square number
sequences-and-series
elementary-number-theory
exponentiation
problem-solving
What book would you recommend to significantly improve my problem solving skills?
algebra-precalculus
reference-request
problem-solving
book-recommendation
book recommendation for problem-solving [closed]
problem-solving
book-recommendation
Book recommendations for Problem Solving
soft-question
self-learning
problem-solving
book-recommendation
learning
If $m,n\in N$ Prove that there is such a positive integer k, such that $(\sqrt{m}+\sqrt{m+1})^n=\sqrt{k}+\sqrt{k+1}$
number-theory
elementary-number-theory
binomial-coefficients
problem-solving
intuition
Problem-solving
reference-request
problem-solving
Problem Solving Methods [duplicate]
soft-question
problem-solving
Proving Holder's inequality using Jensen's inequality
inequality
problem-solving
How to suceed in mathematical olympiads and competitions?
soft-question
problem-solving
Formula(s) for sharing multiple golden geese
sequences-and-series
modular-arithmetic
problem-solving
economics
word-problem
Any partition of $\{1,2,\ldots,100\}$ into seven subsets yields a subset with numbers $a,b,c,d$ such that $a+b=c+d$. [closed]
combinatorics
functions
elementary-set-theory
problem-solving
pigeonhole-principle
Proving that $\frac{1}{\sqrt{1}}+\frac{1}{\sqrt{2}}+\dots+\frac{1}{\sqrt{100}}<20$
inequality
summation
induction
problem-solving
radicals
If $(n_k)$ is strictly increasing and $\lim_{n \to \infty} n_k^{1/2^k} = \infty$ show that $\sum_{k=1}^{\infty} 1/n_k$ is irrational
sequences-and-series
analysis
problem-solving
irrational-numbers
For any unbounded set of real numbers, is there a subset which almost coincides with a uniformly spread out set of points an infinite amount of times?
real-analysis
sequences-and-series
problem-solving
real-numbers
pigeonhole-principle
Soft question- The Bashing Technique and Other powerful techniques for Olympiads
contest-math
problem-solving
Solutions to $a,\ b,\ c,\ \frac{a}{b}+\frac{b}{c}+\frac{c}{a},\ \frac{b}{a} + \frac{c}{b} + \frac{a}{c} \in \mathbb{Z}$
elementary-number-theory
divisibility
diophantine-equations
recreational-mathematics
problem-solving
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