Exploring the shortest path from one corner of a cuboid to another.
Investigating numbers that can be expressed as the sum of a prime square, cube, and fourth power.
Minimal product-sum numbers
Calculate characters saved by expressing Roman numerals in minimal form.
An unexpected way of using two cubes to make a square.
Investigating a square digits number chain with a surprising property.
Find a set of terms that produce longest set of consecutive digits
Find the sum of the perimeters of all almost equilateral triangles with integral side lengths and area.
Find the smallest member of the longest amicable chain
Solve SuDoku puzzles