26 May 2018

588. Route Map: Change one direction

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13 matchsticks are used to form a pathway as shown above. The challenge is to start at point A, move in the direction of the matchstick heads, visit each of the 13 matchsticks only once and finish at point B.

A solution is not possible in the existing figure above, but by changing the direction of only 1 matchstick it can be achieved. How would you do this?

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Change the direction of matchstick 10. The pathway is then from matchstick 1 to 13.

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