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