Shown here is one row with 15 matchsticks. The challenge is to create 5 groups with 3 sticks in each group. A group is formed by placing the 3 sticks vertically above each other by jumping over 3 other sticks.
For example: Take stick 4, jump to the right over 5, 6 and 7 and place it vertically above stick 8. Now take stick 12 and jump to the left over 11, 10 and 9 and also place it above stick 8. (above stick 4 you just moved) One group of 3 sticks has now been formed. Continue to form 4 more groups. Remember the following:
(1) You can jump to the left or right.
(2) Always jump over 3 sticks.
(3) Sticks already placed must also be counted when jumping.