111. Arrange 10 Balls in 5 Lines Arrange 10 balls in 5 lines in such a way that each line contains 4 balls and only 4 balls. ● ● ● ● ● ● ● ● ● ● Submitted by tartle · Added 17 January 2013 · Updated 5 July 2026 Show Solution Solution: Arrange the balls in the shape of a pentagonal star, placing 4 balls at each of the intersecting points of the 5 lines. Each line formed by connecting the points of the star contains exactly 4 balls. 1 2 3 4 5 6 7 8 9 10
Comments (1)
This is quite simple - draw a pentagonal star and you can place 4 balls on each of the intersecting points of the 5 lines
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