Posted on March 18th, 2015 by Bob and Joy Schwabach

PhotoMath, a free app, lets you take a picture of an equation and get an answer plus the steps involved. (Does not recognize handwriting.) Assuming you already have it on a screen somewhere, this is easier than re-typing the mathematical expression at sites like WolframAlpha.com. PhotoMath already has 11 million downloads for the iPhone and Windows Phone version. That’s a lot of downloads but it didn’t work for us. You try it. An Android version is coming soon.

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Posted on September 21st, 2014 by Bob and Joy Schwabach

IFLscience.com has fascinating bits, including “21 GIFs that explain mathematical concepts.” For instance, did you know that the number Pi (3.14159 etc.), is equal to the distance traveled by rolling a wheel exactly one revolution? That distance turns (ha, ha) out to be 3.14 times the diameter. This is true no matter what size the wheel.

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Posted on October 16th, 2013 by Bob and Joy Schwabach

“Good Math,” by Mark Chu-Carroll; $34, from Pragmatic Bookshelf, tells the story of math from imaginary numbers to Egyptian fractions and Roman Numerals.

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Posted on July 3rd, 2013 by Bob and Joy Schwabach

Blog.Ted.com has “8 Math Talks to Blow Your Mind.” Did you know that the infinity of decimals is larger than the infinity of whole numbers? We thought infinity meant infinity. It bothers real mathematicians too.

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Posted on August 27th, 2012 by Bob and Joy Schwabach

KhanAcademy’s free educational videos have been viewed 178 million times on YouTube. Now they’ve launched a “Computer Science” program that teaches kids and adults how to handle JavaScript; that’s the computer language that dominates the Web.

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Posted on December 23rd, 2011 by Bob and Joy Schwabach

You can type anything you want into the Google search bar, and the more specific the question, the better the answer. Now you can also use Google to graph equations.

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Posted on August 31st, 2011 by Bob and Joy Schwabach

We didn’t think the $115 price tag was worth it, but the new “4-bit Steel” watch from Cadence is already sold out. It uses a four-bit binary number system to mark the hours. You don’t need to know the binary system to read it, however, because the marks are all in the same position they would be on an ordinary analog watch. Still, the whole point is to raise your geek score.We tried a cheaper version, which sells for $90 from CadenceWatch.com and is not sold out yet. The only drawback was no glow in the dark minute and hour hands; only the second hand glows not too useful. Programmers should really zero in on this, because the binary system is […]

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Posted on March 7th, 2011 by Bob and Joy Schwabach

New version of Mathematica lets you use free form language instead of programming language.

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Posted on November 23rd, 2010 by Bob and Joy Schwabach

KhanAcademy.org has 1800 mini videos on science, banking, math, and history, all narrated by Sal Khan, a former hedge fund manager. Bill Gates is a fan. Its focus is math and science, but we watched a good video on the bailout.

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Posted on September 25th, 2010 by Bob and Joy Schwabach

“Salary Comparison” lets you compare salaries in various U.S. cities. For example a $37,000 salary in Cleveland, Ohio is equivalent to a $60,000 salary in San Francisco, because the cost of living there is so much higher. Go to tinyurl.com/sconverter. The converter is by WolframAlpha, the mathematical software company.

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