Suppose multiply 45 x 11 Easy way to multiply by 11 is write first figure | ( Add first figure and last figure) | write last figure 45 x 11 = 4 | ( 4+ 5 ) | 5 = 495
Have you felt that squaring a number is the tedious process? Well, not at least for numbers ending with 5. Here I present a simple trick which helps you calculate the squares of 2 digit and 3 digit numbers...
Multiply 2 digit number ended with 5 Example 25*25 Step 1- multiply 5*5 and write it on a paper Step2-multiply 2*2 and then add the same number 2 one times i.e 2*2=4 , 4 + 2 =6 Step 3 - 625 is the answer