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 Aug 20 answered Interesting and unexpected applications of $\pi$ Jul 10 answered Exercise 1 on page 10 in Naive Set Theory, following Axiom of Pairing Jul 1 answered Defining exponentiation on the integers Jun 30 answered Logic problem involving sum of digits Mar 26 answered What skill do I lack to factor multivariate polynomials? Jan 16 answered Cubes differences and primality Jan 10 answered how can I prove that $\frac{\arctan x}{x }< 1$? Jan 5 answered Better way of factorising $x^2-a^2+x+a$ Jan 5 answered Find least possible number of factors Jan 3 answered Three digit number $ABC$ with $ABC = A + B^2 + C^3$ Dec 31 answered How many combinations can a group of n people form? Dec 27 answered Examples of magmas with all their elements idempotents Dec 21 answered Knapsack problem NP-complete Dec 10 answered Ways to write “50” Dec 10 answered Dynamic programming:Making a Change Nov 29 answered Trick for roots of symmetric polynomials Nov 24 answered Prove that $F(1) + F(3) + F(5) + … + F(2n-1) = F(2n)$ Nov 19 answered What is indefinite integral actually - $\int f(x)dx$ or $\int_a^x f(t)dt$? Nov 17 answered Factorize $999999$ into a product of irreducibles in $\mathbb{Z}[i]$ (clarification) Nov 16 answered Show that $A\cap B\subseteq A$ and $A\subseteq A\cup B$