How Well Do You Know Short Cuts To Finding Squares

10 Questions | By Ruso | Updated: Mar 19, 2022 | Attempts: 121

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How Well Do You Know Short Cuts To Finding Squares - Quiz

Finding squares is most people's nightmare judging by the fact that not everyone is meant to be a math guru. Fortunately there are ways to find squares without the help of a calculator. This means that you will not have to memorize the "magic" keys on your calculator but namely know a trick or two that will stick to your head forever. Take our quiz and see if you can figure those tricks out.

Questions and Answers

1.

What are most shortcuts into finding a square based off?
- A.
  
  (a+b) = a^2 + b^2 + 2*a*b
- B.
  
  A^2 + b^2 + 2*a*b
- C.
  
  (a+b)^2= a^2 + b^2 + 2*a*b
- D.
  
  B^2= a^2 + b^2 + 2*a*b
2.

What's the first step into finding the square of 2 digit number which ends in 5?
- A.
  
  Multiply the first digit of the number with the next to its number.
- B.
  
  Multiply the last digit of the number with the next to its number.
- C.
  
  Divide the first digit of the number with the next to its number.
- D.
  
  Substract the first digit of the number with the next to its number.
3.

What's the second step into squaring any 2 digit number?
- A.
  
  To go down 5 from the answer found on step 1.
- B.
  
  To go up 3 from the answer found on step 1.
- C.
  
  To go down 3 from the answer found on step 1.
- D.
  
  To go down 2 from the answer found on step 1.
4.

What is the first step into finding the square of a number between 30 to 79?
- A.
  
  Find how many more or less the given number is from 30.
- B.
  
  Find how many more or less the given number is from 50.
- C.
  
  Find how many more or less the given number is from 70.
- D.
  
  Find how many more or less the given number is from 100.
5.

What is the second step into finding the square of a number between 30 to 79?
- A.
  
  Add the number 25 if more than 50 or subtract the number from 25 if less than 50.
- B.
  
  Subtract the number 25 if more than 50 or add the number from 25 if less than 50.
- C.
  
  Multiply the number 25 if more than 50 or subtract the number from 25 if less than 50.
- D.
  
  Add the number 25 if more than 50 or multiply the number from 25 if less than 50.
6.

What's the last step into finding the square of a number between 30 to 79?
- A.
  
  Find the square of the number added or subtracted and put next to the result arrived at in step 2.
- B.
  
  Find the square of the number added or subtracted and put next to the result arrived at in step 1.
- C.
  
  Find the square of the number added and put next to the result arrived at in step 2.
- D.
  
  Find the square of the number subtracted and put next to the result arrived at in step 1.
7.

What's the first step into mentally square any number from 20 to 29?
- A.
  
  Add given number and the unit's digit.
- B.
  
  Add 20 to the given number and the unit's digit.
- C.
  
  Add 25 to the given number and the unit's digit.
- D.
  
  Substract given number and the unit's digit.
8.

What's the second step into mentally square any number from 20 to 29?
- A.
  
  Tripple the result obtained in step 1
- B.
  
  Double the result obtained in step 1
- C.
  
  Divide the result obtained in step 1 by 10.
- D.
  
  Divide the result obtained in step 1 by 2.
9.

What's the third step into mentally square any number from 20 to 29?
- A.
  
  Square the unit's digit of the number given and place it next to the result obtained in step 1.
- B.
  
  Divide the result obtained in step 1 by 10.
- C.
  
  Square the unit's digit of the number given and place it next to the result obtained in step 2.
- D.
  
  Square the unit's digit of the number given and place it next to the result obtained in step 3.
10.

What's the second step into finding the square of any number between 10 and 19?
- A.
  
  Square the unit's digit and put the number next to the result obtained in step 1.
- B.
  
  Square the unit's digit and put the number next to the result obtained in step 2.
- C.
  
  Square the unit's digit and put the number next to the result obtained in step 3.
- D.
  
  Double the unit's digit and put the number next to the result obtained in step 1.