Tag: 2017 Puzzle Collection

Wed 13 Dec 2017PuzzlesSanta has packed up all his presents into 16 boxes. Each box is a cube: the first is 1m×1m×1m, the second 2m×2m×2m, [...]

Wed 13 Dec 2017PuzzlesA glass Christmas tree decoration is made from three different types of sphere. Seven small spheres, eight middle-sized spheres and [...]

Wed 13 Dec 2017Puzzles

There are only three numbers (>1) that can be written as the sum of fourth powers of their digits […]

Wed 13 Dec 2017PuzzlesIn Pascal’s triangle the number 1 appears infnitely many times. The number 2 appears just once. The number 3 appears twice. [...]