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• 37 A Nice Problem In Additive Number Theory
• 20 Is it possible that $2^{2A}+2^{2B}$ is a square number?
• 17 Let $T$ be any subset of $\{1,2,3,...,100\}$ with $69$ elements. Prove that one can find four distinct integers such that $a+b+c=d$.
• 15 Polynomial outputs containing a particular Integer sequence
• 13 A Pigeonhole-Principle from IMO Shortlist.
• 12 In Search Of Elementary Proof Of Kobayashi's Theorem
• 11 A problem in additive combinatorics
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