16 MATH TRICKS THAY DIDN'T TEACH YOU AT SCHOOL
  14:39

Tricks for doing math quickly in your head

Now we all live in the era of computers, where every person has a calculator in their mobile phone. However, imagine how awesome it can be to count fast large numbers in your head without any help. Your friends and family will be amazed! Or if you are passing an exam and cannot use a calculator?

Moreover these simple math tricks make your brain work and develop, making it easier for you to learn, concentrate and apprehend new information. Time to train your brain!

1. How to count the number of triangles inside one triangle 03:53
If your task is to count the number of triangles in the pictures, give each triangle inside the big one a number from 1 to as many as you have. Now add up the numbers you have just got. For example, 1+2+3... The number you will get is the correct number of triangles in the picture.

2. Fibonacci sequence
In 1200, Fibonacci discovered an amazing number sequence: 0 1 1 2 3 4 8 13 21... Every number is the sum of the two previous ones. The sequence also works in geometry. These numbers form A Golden Rectangle. Spirals formed according to the sequence are often encountered in nature. Beautiful, isn't it?

Timestamps:
01:32 Easy multiplication by 12
03:14 Division by 9
05:16 Multiplying by 13
07:58 How to solve equations instantly
11:08 Fibonacci sequence

Our Social Media:

5-Minute Crafts: https://www.goo.gl/8JVmuC
Facebook: https://www.facebook.com/5Minute.Craf...
Instagram: https://www.instagram.com/5.min.crafts/
Twitter: https://twitter.com/5m_crafts

5-Minute Crafts KIDS: https://goo.gl/PEuLVt
5-Minute Crafts GIRLY: https://goo.gl/fWbJqz

The Bright Side of Youtube: https://goo.gl/rQTJZz This video is made for entertainment purposes. We do not make any warranties about the completeness, safety and reliability. Any action you take upon the information on this video is strictly at your own risk, and we will not be liable for any damages or losses. It is the viewer's responsibility to use judgment, care and precautions if one plans to replicate.

The following video might feature activity performed by our actors within controlled environment- please use judgment, care, and precaution if you plan to replicate.