10 Questions
| Attempts: 121

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.

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