Silly but trickly puzzle

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So my PhD friends couldn’t solve the following problem… 3489 = 48410 = 49120 = 28328 = 42210 = 19910 = 39900 = 47172 = 03884 = 59889 = 69009 = 40911 = 28888 = 8 What is 3859?

Math cheat sheets

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People love to cheat at math for some reason (laziness? lack of understanding? failure to get help?)… anyways, here are some math cheat sheets you can use from different websites: The first one is about algebra, it has 23 pages filled with formulas: Algebra Notes The next one is much shorter about algebra again (4 …

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Calculator for grades K-3

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This calculator is perfect for all those kindergartners who need to do some math… quoted from the website: “The TI-10 is perfect for the primary grades. It combines popular features of the TI-15 Explorerâ„¢, which makes it a unique tool for grades K-3. The TI-10’s comfortable, colorful design helps students find patterns in daily activities …

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Math fails in history

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Dick Lipton wrote a great post over at Gödel’s Lost Letter and P=NP. In his Sept 27th post he talked about surprises in mathematics. In one of his sections he gives three examples of where mathematicians “accepted” a false proof. Sometimes this happens and it might be dozens of years until someone realizes a mistake …

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