An International Mathematical Olympiad level Number Theory problem.

A functional equation from the Swedish Mathematical Olympiad

A probability question from the Cambridge maths entrance exam.

A limit with a nice trick

A seemingly difficult limit, with an elementary trick. Can you figure it…

A simultaneous equation from Putnam

Putnam is one of the most well known undergraduate maths competitions in the world. To some, it…

An elegant functional equation combined with an integral

An International Mathematical Olympiad Inequality

IMO, notoriously the most difficult math competition…

A digit problem from the International Mathematical Olympiad

A Fibonacci Sum.

The Fibonacci sequence is arguably one of the most known sequences in the world, as well as most studied. To the unfamiliar, it…

Can you find the area of the square inscribed in the hexagon?