Multiply any two numbers from 11 to 20 in your head:-
Multiply any two numbers from 11 to 20 in your head Take 15 x 13 for example… Place the larger no. first in your mind and then do something like this.
Take the larger no on the top and the second digit of the smaller no. in the bottom. 15 3 The rest is quite simple. Add 15+3 = 18 . Then multiply it by 10. In this example – 18 x 10 = 180 … Now multiply the second digit of both the no.s (ie; 5 x 3 = 15) Now add 180 + 15. Here is the answer 180 + 15 = 195 . Think over it. This is a simple trick. It will help you a lot.please comment after reading