If you want to qualify any exam, then in most of the exams you need to do faster calculations. Doing faster calculations will let you solve your questions quickly
Suppose you have to find the square of 35. What you will normally do is to multiply 35 with 35 and find the product. But doing this multiplication takes time much longer than this trick. This trick will let you do square root of any number ending in 5 in seconds.
Here the number is 35. So for the number 35, divide this number in two parts i.e. left part and right part. The shortcut trick is to multiply the left part to itself added 1 in it. Here the left part is 3. So multiply 3 to itself added 1 in it. Means 3*(3+1) which is 12.
Now square 5 which is 25. This is our right part of the answer. 25 will always be there for all two digit numbers ending in 5 which we have to square.
Now our answer is left part|right part means 12|25 means 1225. So square of 35 is 1225.
45^2= 4 X (4+1) /25 = 4 X 5/ 25 = 2025
75^2= 7 X 8 / 25 = 5625
115^2= 11 X 12/25 = 13225
This shortcut trick will let you solve squaring of two digit numbers ending in 5 quickly in seconds. Also it is a simple trick to remember and will let you solve squaring of two digit numbers ending in 5by Anil kumar for his blog http://www.MeriView.in