Multiply Up to 20 x 20 In 20 second.

Yes you can solve this in seconds. see how

1. Take 15 x 13 for an example.
2. Always place the larger number of the two on top in your mind.
3. Then draw the shape of Africa mentally so it covers the 15 and the 3 from the 13 below. Those covered numbers are all you need.
4. First add 15 + 3 = 18
5. Add a zero behind it (multiply by 10) to get 180.
6. Multiply the covered lower 3 x the single digit above it the “5″ (3×5= 15)
7. Add 180 + 15 = 195

Posted in: Other Tips and Tricks