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