Quickest way to solve math problem is certainly a magic for many. Competitive exams generally speaking test maths skill of the level of class X. However, the real test lies in solving the problems in shortest possible time , because the test is more on fast and accurate solving the basic maths problem , rather than just knwoing the answers. So tenquestion.com shall publish a series of Mathmegic tricks which will lessen the time in solving a problem
First in this series is the trick to know the Square of any number between 30 to 50.
Let us say you are asked to find the answer of
How much time will you take ? Just do it manually and see .
Here is the easiest trick to find out the square
Step 1: Find out how close is number to 50. In the example it is near 50 by margin of 6.
Step 2: Add 6 to 25 which 31
Step 3: the margin by which the number is greater should be squared i.e 6x 6 = 36
Step 4 : Write 31 and then wrte 36 . Answer is 3136.
Let us take another example
Find out
Similaraly, you should
Step 1: Find out how close is number to 50. In the example it is near 50 by margin of 6.
Step 2: Add 6 to 25 which 31
Step 3: the margin 6 should be squared i.e 36
Step 4 : Write 31 and then wrte 36 . Answer is 3136.
What if the number is below 50 ?
Same procedure , but only thing in step 2 , instead of addition , you deduct the number from 25.
For example , say you require to find out suare of 43 .
So first is to find out margin by which it is below 50. So Margin in this case is 50-43 = 7
So second setp is to DECREASE 7 from 25 . In this case result will be 25-7= 18
Next find square of 7 = 49
Answer is 1849
Now Practice on these numbers and .hey keep a watch to see how fast you have computed
no66 calculations are wrong. it is 4356 .
The answer is Correct , however there was typographical mistake in writing 66 in stead of 56. Original question was square of 56.
However, a great many thanks for pointing out the mistake
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