Let us start with an example: -
How would you multiply this in conventional way?
Let us solve it: -
What are the steps you took here?
- First you multiplied 65 by 5 and wrote it below the line (325)
- Then you multiplied 65 by 6 and wrote it below the first row leaving one space from right (390)
- You added the numbers in first row with the numbers in the second row by first putting right most digits down and adding other digits thereafter conventionally.
- You got 4225 as answer.
Now let us do it by magical method: -
a5 x a5 = a(a+1) | 25
What did we do here?
- We multiplied 5 by 5 and put 25 as right hand side of the answer.
- Multiple left digit…i.e. 6 with 6+1 …so we get 6 into 7…so 42
Did you get it?
Let us do some more by the method learned just now!
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