Durtles

Constructing an unsolvable setup in a colour sorting game.

Constructing an unsolvable setup in a colour sorting game.

Constructing an unsolvable setup in a colour sorting game.

A few problems about sharing apples

A few problems about sharing apples

A rough painting with crayons and pencil crayons on lined A4 paper, of full moon in a clear sky over still water.

A few problems about sharing apples

A few problems about sharing apples

A problem about sorting a shuffled set of cards back into the original order

A problem about sorting a shuffled set of cards back into the original order

A problem about sorting a shuffled set of cards back into the original order

A problem about sorting a shuffled set of cards back into the original order

A few problems about sharing apples

A few problems about sharing apples

A rough painting with crayons and pencil crayons on lined A4 paper, of full moon in a clear sky over still water.

A rough painting with crayons and pencil crayons on lined A4 paper, of full moon in a clear sky over still water.

A rough painting with crayons and pencil crayons on lined A4 paper, of full moon in a clear sky over still water.

A rough painting with crayons and pencil crayons on lined A4 paper, of full moon in a clear sky over still water.

Constructing an unsolvable setup in a colour sorting game.

Constructing an unsolvable setup in a colour sorting game.