Quiz about 8th Grade Math Skills Quiz

Question 1

Solve for $$x$$ : $$2x + 5 = 13$$

Accepted Answer

$$4$$

Answer

$$3$$

Answer

$$5$$

Answer

$$6$$

Question 2

Which equation represents a proportional relationship?

Accepted Answer

$$y = 5x$$

Answer

$$y = 2x + 3$$

Answer

$$y = x^2$$

Answer

$$y = x - 4$$

Question 3

What is the area of a rectangle with length $$8$$ units and width $$3$$ units?

Accepted Answer

$$24$$ square units

Answer

$$11$$ square units

Answer

$$22$$ square units

Answer

$$18$$ square units

Question 4

A set of data has the following values: $$2, 4, 4, 6, 8$$ . What is the mean?

Accepted Answer

$$5$$

Answer

$$4$$

Answer

$$6$$

Answer

$$8$$

Question 5

Which graph represents a linear function?

Accepted Answer

A straight line

Answer

A parabola

Answer

A circle

Answer

A curve

Question 6

If a right triangle has legs of length $$6$$ and $$8$$ , what is the length of the hypotenuse?

Accepted Answer

$$10$$

Answer

$$12$$

Answer

$$14$$

Answer

$$8$$

Question 7

Solve for $$x$$ : $$5x - 7 = 18$$

Accepted Answer

$$5$$

Answer

$$3$$

Answer

$$7$$

Answer

$$6$$

Question 8

A recipe uses $$3$$ cups of flour for $$6$$ cookies. How many cups of flour are needed for $$12$$ cookies?

Accepted Answer

$$6$$

Answer

$$4$$

Answer

$$5$$

Answer

$$9$$

Question 9

What is the volume of a rectangular prism with length $$4$$ cm, width $$3$$ cm, and height $$5$$ cm?

Accepted Answer

$$60$$ cm $$^3$$

Answer

$$12$$ cm $$^3$$

Answer

$$35$$ cm $$^3$$

Answer

$$20$$ cm $$^3$$

Question 10

The median of the data set $$3, 7, 9, 10, 12$$ is:

Accepted Answer

$$9$$

Answer

$$7$$

Answer

$$10$$

Answer

$$12$$

Question 11

Which of the following is the equation of a line with slope $$2$$ and $$y$$ -intercept $$-3$$ ?

Accepted Answer

$$y = 2x - 3$$

Answer

$$y = -3x + 2$$

Answer

$$y = 2x + 3$$

Answer

$$y = -2x - 3$$

Question 12

If $$a$$ and $$b$$ are the legs of a right triangle and $$c$$ is the hypotenuse, which equation is correct?

Accepted Answer

$$a^2 + b^2 = c^2$$

Answer

$$a^2 - b^2 = c^2$$

Answer

$$a^2 + c^2 = b^2$$

Answer

$$a^2 = b^2 + c^2$$

Question 13

Solve for $$x$$ : $$3(x - 2) = 9$$

Accepted Answer

$$5$$

Answer

$$1$$

Answer

$$2$$

Answer

$$3$$

Question 14

A car travels $$180$$ miles in $$3$$ hours. What is its average speed?

Accepted Answer

$$60$$ mph

Answer

$$90$$ mph

Answer

$$30$$ mph

Answer

$$45$$ mph

Question 15

What is the area of a triangle with base $$10$$ units and height $$6$$ units?

Accepted Answer

$$30$$ square units

Answer

$$60$$ square units

Answer

$$16$$ square units

Answer

$$36$$ square units

Question 16

Which of the following is NOT a proportional relationship?

Accepted Answer

$$y = x + 2$$

Answer

$$y = 4x$$

Answer

$$y = 0.5x$$

Answer

$$y = 7x$$

Question 17

The range of the data set $$5, 8, 12, 15, 20$$ is:

Accepted Answer

$$15$$

Answer

$$5$$

Answer

$$8$$

Answer

$$20$$

Question 18

Which point lies on the line $$y = 3x - 2$$ ?

Accepted Answer

$$(0, -2)$$

Answer

$$(1, 1)$$

Answer

$$(2, 4)$$

Answer

$$(3, 7)$$

Question 19

If the legs of a right triangle are $$9$$ and $$12$$ , what is the length of the hypotenuse?

Accepted Answer

$$15$$

Answer

$$13$$

Answer

$$12$$

Answer

$$10$$

Question 20

Solve for $$x$$ : $$x/4 = 7$$

Accepted Answer

$$28$$

Answer

$$11$$

Answer

$$21$$

Answer

$$32$$

Question 21

A store sells $$5$$ apples for $$2$$ dollars. How much do $$20$$ apples cost?

Accepted Answer

$$8$$

Answer

$$6$$

Answer

$$10$$

Answer

$$12$$

Question 22

What is the volume of a cube with side length $$3$$ cm?

Accepted Answer

$$27$$ cm $$^3$$

Answer

$$6$$ cm $$^3$$

Answer

$$9$$ cm $$^3$$

Answer

$$18$$ cm $$^3$$

Question 23

The mode of the data set $$2, 3, 3, 5, 7$$ is:

Accepted Answer

$$3$$

Answer

$$2$$

Answer

$$5$$

Answer

$$7$$

Question 24

Which equation has a slope of $$-4$$ ?

Accepted Answer

$$y = -4x + 2$$

Answer

$$y = 4x + 1$$

Answer

$$y = x - 4$$

Answer

$$y = -x + 4$$

Question 25

If $$a = 8$$ and $$b = 15$$ , what is $$c$$ in the Pythagorean theorem?

Accepted Answer

$$17$$

Answer

$$16$$

Answer

$$13$$

Answer

$$12$$

Question 26

Solve for $$x$$ : $$7x + 2 = 23$$

Accepted Answer

$$3$$

Answer

$$2$$

Answer

$$4$$

Answer

$$5$$

Question 27

A map uses a scale of $$1$$ inch $$= 5$$ miles. How many miles does $$3$$ inches represent?

Accepted Answer

$$15$$

Answer

$$8$$

Answer

$$10$$

Answer

$$12$$

Question 28

What is the area of a circle with radius $$4$$ units? (Use $$\pi \approx 3.14$$ )

Accepted Answer

$$50.24$$ square units

Answer

$$12.56$$ square units

Answer

$$25.12$$ square units

Answer

$$31.4$$ square units

Question 29

Which of the following is a linear function?

Accepted Answer

$$y = 2x - 5$$

Answer

$$y = x^2 + 1$$

Answer

$$y = \sqrt{x}$$

Answer

$$y = \frac{1}{x}$$

Question 30

If the legs of a right triangle are $$5$$ and $$12$$ , what is the length of the hypotenuse?

Accepted Answer

$$13$$

Answer

$$11$$

Answer

$$12$$

Answer

$$14$$

8th Grade Math Skills Quiz

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