21 September 2014

211. Turn 7 sticks pointing downwards

Easy Medium Hard Extreme


Shown above are 8 matchsticks pointing UPWARDS. The challenge in this puzzle is to turn 7 sticks to point DOWNWARDS by following certain rules.

The rules are:
1. Always start with a stick pointing UPWARDS, skip the next 2 and turn the 3rd one. As an example, start with stick 4, skip 5 and 6 and turn 7 to point downwards.
2. You may only count from LEFT to RIGHT.
3. If you reach the end of the row before the end of counting, you need to continue to the beginning of the row again. As an example, if you start at 7, skip 8 and 1 and turn 2 downwards.

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There are also other solutions, but the solution illustrated above is:

Step 1: Start with 1. Skip 2 and 3. Turn 4
Step 2: Start with 6. Skip 7 and 8. Turn 1
Step 3: Start with 3. Skip 4 and 5. Turn 6
Step 4: Start with 8. Skip 1 and 2. Turn 3
Step 5: Start with 5. Skip 6 and 7. Turn 8
Step 6: Start with 2. Skip 3 and 4. Turn 5
Step 7: Start with 7. Skip 8 and 1. Turn 2

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