Amazing Math Trick! #2

This video can guess the result of your mathematical calculations using a small mathematical trick.
The world of mathematics is not as boring and monotonous, as it seems to many. The figures can become instruments of a magician, no less than the card or other items. Mathematical trick with numbers based on the ability to deal with numbers and the laws of exact science, with such tricks in no way diminish its importance.
Focuses using mathematics are not only able to entertain a person who is experienced in the exact sciences, but also to attract attention and build interest in the "queen of sciences" from those who are only familiar with it.

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