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Apr
21
revised Approximation of an expression (no calculator please!)
added 2 characters in body
Apr
16
revised Quotient group(Factor group)
mathjax added;
Apr
15
revised Why non-real means only the square root of negative?
mathjax added;
Apr
14
revised Find remainder when $2^{30}\cdot 3^{20}$ is divided by $7$ without using calculator
mathjax added;
Apr
9
revised Analysis of how-many-squares and rectangles are are there on a chess board?
mathjax added;
Apr
5
revised General solution of $y''+y'=0$
mathjax fixed;
Mar
29
revised Does $^nC_{n+1}$ exist?
mathjax added;
Mar
29
revised Figuring domain of constant $a$ in a equation with some condition
added 231 characters in body
Mar
27
revised Find value of $k$ for which the equation has real roots
deleted 1 character in body
Mar
26
revised How to draw the graph of $x^6 = y^3$ and $3y = (log x)^2$?
mathjax added;
Mar
26
revised How to draw the graph of $x^6 = y^3$ and $3y = (log x)^2$?
edited body
Mar
26
revised How to draw the graph of $x^6 = y^3$ and $3y = (log x)^2$?
deleted 5 characters in body
Mar
14
revised Prove that $ n^2$ tends to infinity as $n$ tends to infinity
mathjax added;
Mar
14
revised Does the square or the circle have the greater perimeter? A surprisingly hard problem for high schoolers
mathjax added;
Mar
8
revised Can every even integer greater than four be written as a sum of two twin primes?
mathjax added;
Mar
8
revised To determine number of arrangements of 4 letters in a word so that the transitions remains conserved
mathjax added;
Mar
8
revised Solve a system of differential equations where argument of one function depend at another argument
mathjax added;
Mar
8
revised Size of the product of two subgroups
mathjax added;
Mar
8
revised Bijection from $\mathbb{N} \to \mathbb{N}$
mathjax added;
Mar
8
revised How one can show $P(ax+n|x)=P(n)$?
Title edited;