16 cubes in a bag.
All you have to do is arrange them in 4 rows of 4 so that no two numbers are repeated either vertically, horizontally or diagonally.
Sounds easy but obviously it wouldn’t be much of a puzzle if it were.
Like all our favourite puzzles sometimes the easier it looks the harder it will be.
Puzzle made of solid wooden cubes painted black and each engraved with numbers 1 to 4.
Packed in a green or black cotton drawstring bag.