5.PFA.2

If 'n' represents a number, what is the expression for '3 less than the number'?

• A. 3n

• B. n + 3

• C. n - 3

• D. 3 / n

What is the correct way to represent 'twice a number' using a variable?

• A. 2n

• B. n / 2

• C. n - 2

• D. n + 2

If 'r' represents a number, what is the expression for '5 less than the number'?

• A. 5 / r

• B. r - 5

• C. r + 5

• D. 5r

Which of the following is an example of a variable?

• A. 2

• B. x

• C. 10

• D. A

What is a variable in the context of mathematics?

• A. A number that never changes

• B. A constant value

• C. A representation of an unknown quantity

• D. A symbol used for multiplication

If a number is represented by the variable 'x', what is the expression for '5 more than the number'?

• A. 5 / x

• B. x - 5

• C. x + 5

• D. 5x

What is the correct way to represent 'half of a number' using a variable?

• A. n + 2

• B. n - 2

• C. 2n

• D. n / 2

What is the correct way to represent 'triple a number' using a variable?

• A. n + 3

• B. n - 3

• C. n / 3

• D. 3n

What does the variable 's' represent in the equation 's * 3 = 12'?

• A. The result of dividing 12 by 3

• B. The difference between 12 and 3

If 'm' represents a number, what is the expression for '4 more than the number'?

• m - 4

• 4m

• m + 4

• m / 4