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How to setup aws cmd line tools

May 31st, 2013 No comments

To be able to execute the many API command line tools you will need to setup and configure the authentication correctly.
This will help you to do just that.

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Mental Multiplication Trick

December 2nd, 2008 No comments

Amazing Multiplication Trick

Tip #1: Multiplying by Powers of 5

There are times in life when you just get lucky. It turns out that one of those lucky little moments occurs each and every time you need to multiply one number by another number that happens to be a power of 5. For example, let’s say you need to find 36 x 5 (which, of course, fits the bill since 5 is the first power of 5). The trick is to recognize the fact that 5 = 10 / 2. Why is that helpful? Because it means that we can find 36 x 5 by instead finding 36 x 10 (which is easy) and then dividing the result by 2. In this case, 36 x 10 = 360, and 360 / 2 = 180. Impressively speedy, right?

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