14 June 2011

50. Vertical, Horizontal and Diagonal Rows

Shown here are 7 sticks placed in such a way that it forms a horizontal row (sticks 2,4,6), two vertical rows (sticks 1,2,3 and 5,6,7) and two diagonal rows. (sticks 1,4,7 and 3,4,5) Note that there are 3 sticks in the row each time. The vertical and horizontal distance between sticks is exactly one matchstick.
The challenge is to add 2 sticks so that there are 7 diagonal rows, 3 vertical rows and 1 horizontal row, still with 3 sticks in a row.

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