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Puzzle 149. RIVER CROSSING |
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Five men and five boys have to cross the Mississippi River to attend a birthday party. They have only one row boat with them. Because of the small size of the row boat, the boat can not carry more than one man, or more than two boys. Thus, a man riding with a boy would not be possible. What would be the least number of boat trips that would take everyone to the other shore? |
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Bits and Beyond ... PLATONIC SOLIDS Platonic solids are regular geometric solids with regular plane faces. There are only five platonic solids. These are the cube, tetrahedron, octahedron, icosahedrons, and dodecahedron. The cube has six faces, each of which is a square. The tetrahedron has four equilateral triangular faces. The octahedron has eight equilateral triangular faces. The icosahedron has twenty equilateral triangular faces. Lastly, the dodecahedron has twelve equilateral pentagonal faces.
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