## Mental math challengesPresents hands-on tasks and do-it-yourself activities using simple materials and inexpensive supplies demonstrating logic and reasoning abilities in mathematics. |

### What people are saying - Write a review

We haven't found any reviews in the usual places.

### Contents

Contents | 5 |

Tetrahedron Makes a Terrific Paperweight | 19 |

The Odd Kings OddNumbered Problem | 39 |

Copyright | |

2 other sections not shown

### Other editions - View all

### Common terms and phrases

Ankh answer arrangement Ask the friend bristol board Buffon calculator card stock cardboard or thin Charm Card CONSTRUCTION 1 Photocopy cross cylinder diagonal scale diagram different color digit sum digits empty square envelope EXTRA CHALLENGE five cards flap flexagon flexatube floating sphere Fold garden glue Hint hypotenuse jumps larger square length Lodestone magic marker MATERIALS NEEDED heavy math magician measure MISSING DOLLAR move thread NEEDED heavy cardboard NEEDED heavy paper nine pennies number of letters Number of paths odd numbers Pascal's Triangle pencil pentagon Pentagram perfect square polygon Pythagorean theorem reach nail 24 rectangle rectangular remainder right triangle roll ruler scissors shapes Shopping list shown side sixty oranges skip three smaller pyramids smaller square solution spectator square root Stringing sequence taped pages tetrahedron thin plywood toothbrushes toothpicks top card tosses trapezoid utility knife vertical line