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This set is an archive of notes I wrote and posted on Brilliant. Most of these revolve around things that ...

From Math With Bad Drawings.

As 2015 comes to an end, here are some new year's resolutions for mathematicians.

What are your new year's resolutions? Share them in ...

\[\begin{eqnarray} p(x)&=&51x^2+mx+c \\ q(x)&=&3x^2+bx+a \end{eqnarray}\]

\(p(x)\) and \(q(x)\) are two quadratic polynomials with integer coefficients ...

At least once, I have seen a posted solution to a problem on Brilliant in which the following argument appears to have been used:

"The problem would not have been ...

Enter your B'day in this note, and see how many people have the same date, irrespective of years. The group having the maximum number of members wins!

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