Weekly Logic Puzzle January 07 2014, 0 Comments

Luminous Learning Math Challenge Puzzles for Students with Learning Disabilities

Last Week's Puzzle

A carpenter, working with a buzz saw, wishes to cut a wooden cube, three inches on a side, into 27 one-inch cubes. He can do this easily by making six cuts through the cube, keeping the pieces together in the cube shape. Can he reduce the number of necessary cuts by rearranging the pieces after each cut?5?

Answer: There is no way to reduce the cuts to fewer than six. This is at once apparent when you focus on the fact that a cube has six sides. The saw cuts straight— one side at a time. To cut the one-inch cube at the center (the one which has no exposed surfaces to start with) must take six passes of the saw.

This Week's Puzzle

Luminous Learning math riddles for special education students.

Four marbles can be placed so that each marble touches the other three.

Is it possible to place six toothpicks so that each touches the other five?

 

A new puzzle is posted weekly. Post your guesses below and check back next week to find out the answer!