Easy | Medium | Hard | Extreme |

Shown above are 4 matchsticks crossing one another at 6 points. (marked with blue circles) How many crossings can be formed with 5 matchsticks?

A Collection

Easy | Medium | Hard | Extreme |

Shown above is a six sided convex polygon built from 1 square and 2 triangles. 8 matchsticks were used to achieve this. The outside angles are all greater than 180 degrees as illustrated with angle "a" above.

Create your own convex polygon. The following rules apply:

1. Polygon to have 7 sides

2. 12 matchsticks to be used

3. All outside angles to be greater than 180 degrees

4. There must be 3 equal sized triangles

5. There must be 2 equal sized squares

6. All matchsticks to be flat on the surface.

Easy | Medium | Hard | Extreme |

Place 6 broken matchsticks (2 with heads and 4 without heads) as shown in the figure left above. The challenge is to move the broken matchsticks and to end as shown in the figure right. Only 1 broken matchstick may be in a square when moving.

Can you achieve this in only 9 moves?

The following is 1 solution:

E to C

F to A

C to F

D to C

H to B

I to D

F to I

G to F

I to E

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