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Wag Worms

Stage: 2 Challenge Level: Challenge Level:3 Challenge Level:3 Challenge Level:3

When intergalactic Wag Worms are born they look just like a cube.



Each year they grow another cube in any direction (except on their faces of course). So a Wag Worm in its second year might look like any of these.

Cube

The next year it grows another cube onto its second cube (not its face cube). So one shape a Worm in its third year can be is this:

Cube

Find all the shapes that a Wag Worm in its third year can be.


Click here for a poster of this problem.