Skip to main content

How to get square of number by Trick

Square of a number 
From 1 to 30 (this is damn easy) You need to remember. Based on this We are going to explain square of a number from 31 to 100. 



31 to 100 is divided into 3 parts 
  • 31 to 50
  • 51 to 80
  • 81 to 100

From 31 to 50: 

Find the square of 38. 

First Step : 
122 = 50 - 12 (haan bhai haan fir se 50 ) 

Second Step : 
Last 2 Digit : 122 = 144 =44 (1 Carry) 
First 2 Digit : 25 - 12+1 =14 
25 hamesha ki tarah Constant ..You need to add 
12 comes from (50-12) 
1 upar wala carry 

Final answer =1444 (First 2 Digit Last 2 Digit) 
38= 1444 

Find the Square of 47. 

First Step : 
47 =50 - 03 

Second Step : 
Last 2 Digit : 09 ( kaise ? 3 ka Sqaure ) Carry ? Zero 
First 2 Digit : 25 - 03 + 0 = 22 
25 constant …yaad rakho 
03 comes from 50 - 03 
Carry to zero hi aya tha 

So final Answer is 2209 (First 2 Digit Last 2 Digit) 
47= 2209 

Rapid Fire Round ! 

1) Find the Square of 33. 
33 =50 - 17 
Last 2 Digit =289 =89 ( 2 carry) 
First 2 Digit =25 - 17 + 2 =10 
Final Answer =1089 

2) Find the square of 42. 
42 = 50 - 08 
Last 2 Digit = 64 ( Carry Zero) 
First 2 Digit = 25 - 8 + 0 =17 
Final Answer =1764 

3) Find the Square of 45. 
Last 2 Digit =25 
First 2 Digit =4*(4+1) =20 
Final Answer =2025 

Let’s see 51 to 80 : 

Find the Square of 62

First Step – 50+12 ( Yes, every time You have to think like this 50 + ) 

{If the number is 72 We will write 50+22} 

Second Step –   4 Digit number is the answer ( From 32 to 99 Every Number Square has 4 Digits) 

Last 2 Digit :   122 = 144 = 44 ( 1 will be carry ) 

First 2 Digit : 25 + 12 + 1 = 38 

25 is constant number for every number 51-80 You have to add this!!

12 comes from (50+12) 

So our final result is 3844 (See First 2 Digit and Last 2 Digit above) 
62= 3844

Thoda to jarur samjh me aaya hoga ?  Solve another question 

Find the Square of 77 

50 +27 ( Every time You have to think like this) 

_ _ _ _  — First 2 Digit Last 2 Digit 

Last 2 Digit : 272  =729 = 29 ( 7 is carry ) 

First 2 Digit : 25+27+ 7 =59 

25 is constant as I said before You have to add every time this number!!

27 comes from (50+27) 

How to add 25+27+7? 

(Thought process will go like this 25+(25+2)+7=(25+25+9) =(50+9=59) 

So Final Answer is .. 5929

Hmm ..You can do it fast …just You need practice …Ghar me Practice karoge to Exam me without putting pen on the Paper You can do it. 


Lets Solve few examples in Simple way 

1)Find the Square of 53 ? 

Last 2 Digit =09 ( No Carry here ) 

First 2 Digit =25+3+0 =28 

2)Find the Square of 66 ? 

Last 2 Digit =256=56 ( 2 Carry ) 

First 2 Digit =25+16+2 =43 

3)Find the Square of 75 ? 

Don’t use above method 

First 2 Digit =7(7+1) =56 

Now, let’s see for 81 to 100 : 

Find the square of 88

First Step : 
88=100 -12 ( Yes 100-12 Only , not 50+38 or 80+8 ) 
{If the number is 92 then we have to think like 100-8} 

Second Step : 
_ _ _ _ 4 Digit number is the answer.As I said before Square of any number b/w 32 and 99 has 4 digits. 

Last 2 Digit : 122 = 144 = 44 (1 carry ) 

First 2 Digit : 88 – 12 + 1 =77 
88 is the given number jiska hum square find kar rhe he 
12 comes from 100-12 
1 is as usual carry ( 100-12 doesn’t mean that we have to minus 1 from 
the number..here also we add ) 

So our final Answer is 7744 (First 2 Digit Last 2 Digit) 
88= 7744 
(Btw this number is Special,No other number square has this form XXYY) 

Let’s do another sum 
Find the Square of 92 . 

First Step :
 
92 =100-8 ( Yes 100-8 only ,don’t confuse with 50+ ) 

Second Step : 
Last 2 Digit : 82 = 64 ( It’s only the last 2 Digit …No carry) 

First 2 Digit : 92-8+0 =84 

92 is given number 
8 is from 100-8 
O is carry ( Carry to Anda hi aaya tha ) 

Final Answer is 8464 ( First 2 Digit Last 2 Digit ) 
922 =8464 

Rapid Fire Round ! 

1)Find the square of 96. 
96=100-4 
Last 2 Digit =16 (How come 16 ? 4 ka Square ) Carry Zero 
First 2 Digit =96-4+0 =92 
Final Answer =9216 

2) Find the Square of 81. 
81 =100-19 
Last 2 Digit = 192= 361 =61 (Carry 3) 
First 2 Digit =81-19+3 =65 
Final Answer =6561 

3) Find the Square of 85. 
Last 2 Digit =25 
First 2 Digit =8*(8+1) =72 
Final Answer =7225



Popular posts from this blog

Spotting Error Quiz IV - With Explanation For SSC Exam 2015

  Hello Readers, As you know that Spotting Error types question is an important part of competitive examinations and seldom any book provide you the detailed solution. So we have decided to provide you the previous year questions of  spotting error along with the Explanation . If you like it let us know, you can also ask for detailed solutions of questions that are bothering you. 1.     I found (a)/ the two first chapters of the book (b)/ particularly interesting. (c)/ No error (d) Answer    (b) Explanation : It should be   ‘the first two chapters’ . 2.     Bacon, the father of the English easy (a) / had a thirst (b) / of knowledge (c) / No error (d) Answer    (a) Explanation : The English means the citizen of England.   Article is not used before language

English Error Spotting - Previous Year Questions of SSC CGL

Competition Zenith brings you a post on Error Spotting to boost your English for competitive exams. We are providing you the specifically chosen questions from previous year papers of SSC CGL with the best possible explanation in simplest of the language. Below are some questions with explanation: Questions 1. Have trust on(a)/God and everything(b) /will be right.(c) /(d) No error 2. The cattles (a) /are grazing (b) /in the fields.(c) /(d) No error 3. He is one of (a)/ the best novelists (b) /that has ever lived. Do you agree? (c)/no error (d) 4. On a rainy day (a) /I enjoy to watch TV (b) / with a hot cup of tea.(c ) /no error(d) 5. No sooner did (a)/I reach (b)/ Patna railway station than the train departed(c)/no error (d) 6. There is no agreement (a) / between you and I (b) /so we are free to go our way(c) /no error (d) 7. A variety of books (a) / is available in the market (b) / to help the students qualify the competitive examinations.(c) /no error 8.

Easy way to understand Direct and Indirect speech rules

Introduction. There two ways to convey a message of a person, or the words spoken by a person to other person. 1.       Direct speech 2.       Indirect speech Suppose your friend whose name is Vipul tells you in College , “I will give you a pen”. You come to home and you want to tell your brother what your friend told you. There are two ways to tell him. Direct speech:   Vipul said, “I will give you a pen”. Indirect Speech:  Vipul said that he would give me a pen. In direct speech   the original words of person are narrated (no change is made) and are enclosed in quotation mark. While in indirect speech some changes are made in original words of the person because these words have been spoken in past so the tense will change accordingly and pronoun may also be changed accordingly. In indirect speech  the statement of the person is not enclosed in quotation marks, the word “ that ” may be used before the statement to show that it is indirect sp