example usage of vedic / fast maths.

lets see in what all ways the vedic maths or better say fast maths can be used to beat your own mental skills and in some cases, even calculator ;)

Example 1 : Finding Square of a number ending with 5
To find the square of 75

Do the following

Multiply 5 by 5 and put (5X5)=25 as your right part of answer.
=> xxxxxxx25
now,Multiply 7 with the next higher digit
=> 7 X (7+1)=7X8
gives 56 as the left part of the answer
so, Answer is 5625


Example 2 : Calculate 43 X 47 (The above 'rule' works when you multiply 2 numbers with units digits add upto 10 and tenth place same)
3X7=21
xxxxxxx21
4X(4+1)=20

The answer is 2021 Same theory worked here too.

same as above; Find 52 X 58 ? Answer = 3016 How long this take ?

Example 3: Multiply 52 X 11
answer is 572
Write down the number being multiplied
5xxxxxxxxx2
and put the total of the digits between two digits
52 X 11 is [ 5 and 5+2=7 and 2 ] ,
answer is 572
note: in case you want to multiply 52 with 111
just write 7 twice => 5772
in case of 1111
57772

sum,here 5+2 = 7 is written one time lesser than the 1's in the digit.