This time it is not a video, but it is slide show. It worth a watch  which will tell you 1. how to multiple any 3 digit number with 7 or 11 or 13 2. multiply any two digit number by 3367 3. Squaring a two digit number starting with 5 4. Squaring a two digit number ending with 5 5. squaring numbers made up of sixes (6,66,666 etc) 6. Multiply up to 20x20 in your head 7. And some tricks like Missing digit trick Birthday trick 24 mystery Prime number trick amazing math trick of 1999 phone number trick joker's math trick 1 and 2 Mind reading number trick

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You can see 9 more things you can create with Old CDs here

  [Via Bitrebels]

Your society teaches you to be blind because the society needs blind people. They are good slaves because they are always dependent on the leaders, politicians, pundits, priests. They are very convenient people, they never create any trouble. They are never rebels. They are obedient, always ready to submit to any kind of nonsense, to any stupid politician, to any stupid priest.

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