Funny math tricks and tips for multiplication

I often use these tricks  to prove myself good in math’s although I am a very bad in mathematics. You can challenge your friends, that you are better than a normal calculator. How? just follow the process 

Tell your friend to calculate 111111111 x 111111111 with the help of his calculator. ;) 

Your friend will find the result too large to be calculated by a calculator. Now you can surprise him by giving the answer. The answer will be 12345678987654321 

How can you calculate: When you multiply by the same number of 1's in both side then just count the 1's in 1 side. For example, in the multiplication 111111111x111111111 we have 9, 1's in each side. So type or write from 1 to 9 (123456789) . After typing 9 then start writing from the reverse (87654321). So in aggregate the answer will be 12345678987654321 . 

IN THE SAME WAY ,

11 x 11 = 121

111 x 111 = 12321

1111 x 1111= 1234321

11111 x 11111 = 123454321 

111111 x 111111= 12345654321 

1111111 x 1111111= 1234567654321 

11111111 x 11111111= 123456787654321 

111111111 x 111111111= 12345678987654321 

I hope you will understand the tricks from the example ;) 

Now the second tricks called "without 8" 

Take a number of digits from 1 to 9 except the digit 8. So the number is 12345679 

Now if you multiply the number by 9 the answer will be 111111111 .    

Again if you multiply the number by 9x2 (18) the answer will be 222222222

again, if you multiply the number by 9x3 (27) the answer will be 333333333 

 The whole example :

12345679 x 9 = 111111111

12345679 x 18 = 222222222

12345679 x 27 = 333333333

12345679 x 36 = 444444444

12345679 x 45 = 555555555

12345679 x 54 = 666666666

12345679 x 63 = 777777777

12345679 x 72 = 888888888

12345679 x 81 = 999999999

I hope you will enjoy the trick, remember math is fun when you know how to play with it ;) Thank you for visiting  this Blog

Courtesy : http://bnjho.blogspot.in