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Help
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, withing 24 hours on weekdays.
Customer service
All questions about your order, return and delivery must be sent to our customer service team by e-mail at yourstore@yourdomain.com
Sale & Press
If you are interested in selling our products, need more information about our brand or wish to make a collaboration, please contact us at press@yourdomain.com
Product Description Put your mathematical thinking cap onbecause even though these puzzles are toughies, they take insight and brainwork to solve, not a knowledge of calculus or linear algebra or any other kind of advanced math. Consider for a moment:* How can you divide a regular pentagon into five identical pentagonal shapes?* What is the only decade in American history to contain four primenumbered years?* What three right triangles with integer sides have areas numerically equal to twice their perimeters? Don't worry if the answers don't spring to mind immediately; you'll have plenty of company. Compute without calculators; study the 'survival of the splittest' by arithmetically analyzing a little amoeba reproduction; and investigate whether or not a rich man's children are getting a 'square deal' with their inheritance. Just don't give up, because you'll have a lot of satisfaction when you figure them out. About the Author Newton Center, MA
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