# FREE PSAT Math Practice Test

Welcome to our FREE PSAT/NMSQT Math practice test, with answer key and answer explanations. This practice test’s realistic format and high-quality practice questions can help you or your students prepare for the PSAT Math test. Not only does the test closely match what students will see on the real PSAT, but it also comes with detailed answer explanations.

For this practice test, we’ve selected 20 real questions from past exams for your PSAT Practice test. You will have the chance to try out the most common PSAT Math questions. For every question, there is an in-depth explanation of how to solve the question and how to avoid mistakes next time.

Use our free PSAT Math practice tests and study resources (updated for 2021) to ace the PSAT Math test! Make sure to follow some of the related links at the bottom of this post to get a better idea of what kind of mathematics questions you need to practice.

## 10 Sample PSAT Math Practice Questions

1-

Based on the graph, how many women should be added to city D until the ratio of women to men will be 1.2?

A. 120

B. 128

C. 132

D. 160

2- In the rectangle below if $$y>5$$ cm and the area of rectangle is 50 square centimeter and the perimeter of the rectangle is 30 cm, what is the value of $$x$$ and $$y$$ respectively?

A. 4, 11

B. 5, 11

C. 5, 10

D. 4, 10

3- Given the right triangle ABC bellow, sin⁡($$β$$) is equal to?

A. $$\frac{a}{b}$$

B. $$\frac{a}{\sqrt {(a^2+b^2 )}}$$

C. $$\frac{\sqrt {(a^2+b^2 )}}{ab}$$

D. $$\frac{b}{\sqrt{(a^2+b^2 )}}$$

4- Solve the following inequality.
$$|\frac{x}{2}-2x+10|<5$$

A. $$-\frac{10}{3}< x < 10$$

B. $$-10 < x <\frac{10}{3}$$

C. $$\frac{10}{3} < x < 10$$

D. $$-10 < x < -\frac{10}{3}$$

5- $$f(x)= ax^2+bx+c$$ is a quadratic function where a, b and c are constant. The value of x of the point of intersection of this quadratic function and linear function $$g(x) = 2x – 3$$ is 2. The vertex of $$f(x)$$ is at (-2, 5). What is the product of a, b and c? ___________

6- A ladder leans against a wall forming a $$60^\circ$$ angle between the ground and the ladder. If the bottom of the ladder is 30 feet away from the wall, how many feet is the ladder? __________

7- The volume of cube A is $$\frac{1}{2}$$ of its surface area. What is the length of an edge of cube A? ____________

8- If $$3x + 6y = \frac{-3y^2+15}{x}$$ , what is the value of $$(x+y)^2$$ $$(x≠0)$$?

9- If $$3x – 5 = 8.5$$, what is the value of $$5x + 3$$ ?

A. 13

B. 15.5

C. 20.5

D. 25.5

10- In a certain bookshelf of a library, there are 35 biology books, 95 history books, and 80 language books. What is the ratio of the number of biology books to the total number of books in this bookshelf?

A. $$\frac{1}{4}$$

B. $$\frac{1}{6}$$

C. $$\frac{2}{7}$$

D. $$\frac{3}{8}$$

11- In the figure below, what is the value of $$x$$?

A. 43

B. 67

C. 77

D. 90

12- The following table represents the value of $$x$$ and function $$f(x)$$. Which of the following could be the equation of the function $$f(x)$$?

A. $$f(x)=x^2-5$$

B. $$f(x)=x^2-1$$

C. $$f(x)=\sqrt{(x+2)}$$

D. $$f(x)=\sqrt x+4$$

13- If $$xp + 2yq = 26$$ and $$xp + yq = 17$$, what is the value of $$yq$$?

A. 6

B. 7

C. 8

D. 9

14- The circle graph below shows all Mr. Green’s expenses for last month. If he spent $660 on his car, how much did he spend for his rent? A.$700

B. $740 C.$780

D. \$810

15- If $$x^2+3$$ and $$x^2-3$$ are two factors of the polynomial $$12x^4+n$$ and n is a constant, what is the value of n?

A. $$-108$$

B. $$-24$$

C. 24

D. 108

16- The letters represent two decimals listed above. One of the decimals is equivalent to $$\frac{1}{8}$$ and the other is equivalent to $$\frac{1}{20}$$. What is the product of C and D?

A. 0

B. 5

C. 25

D. 20

17- The radius of circle A is three times the radius of circle B. If the circumference of circle A is $$18π$$, what is the area of circle B?

A. $$3π$$

B. $$6π$$

C. $$9π$$

D. $$12π$$

18- If the function$$ƒ$$ is defined by $$f(x)=x^2+2x-5$$, which of the following is equivalent to $$f(3t^2)$$?

A. $$3t^4+6t^2-5$$

B. $$9t^4+6t^2-5$$

C. $$3t^4+3t^2-5$$

D. $$3t^4+6t^2+5$$

19- In the diagram below, circle A represents the set of all odd numbers, circle B represents the set of all negative numbers, and circle C represents the set of all multiples of 5. Which number could be replaced with $$y$$?

A. 5

B. 0

C. $$-5$$

D. $$-10$$

20- There are only red and blue marbles in a box. The probability of choosing a red marble in the box at random is one fourth. If there are 132 blue marbles, how many marbles are in the box?

A. 140

B. 156

C. 176

D. 190

## Best PSAT Math Prep Resource for 2021

1- C
Let the number of women should be added to city D be $$x$$, then:
$$\frac{(528+x)}{550} = 1.2 → 528 + x = 550 × 1.2 = 660 → x = 132$$

2- C
The perimeter of the rectangle is:
$$2x + 2y = 30 → x + y =15→ x = 15 – y$$
The area of the rectangle is:
$$x × y = 50 → (15 – y)(y) = 50→ y^2 – 15y + 50 = 0$$
Solve the quadratic equation by factoring method.
$$(y – 5)(y – 10) = 0→y = 5$$
(Unacceptable, because y must be greater than 5) or $$y = 10$$
If $$\space y = 10 →x × y = 50→x × 10 = 50→x = 5$$

3- D
sin⁡$$β = \frac{opposit \space side}{hypotenuse}$$
To find the hypotenuse, we need to use Pythagorean theorem.
$$a^2+b^2=c^2→c=\sqrt{(a^2+b^2 )}$$
sin$$⁡(β) =\ \frac{b}{c}= \frac{b}{\sqrt{(a^2+b^2 )}}$$

4- C
$$|\frac{x}{2}-2x+10|<5$$
$$|- \frac{3}{2}x -2x+10|<5$$
$$-5<-\frac{3}{2}x +10<5$$
Subtract 10 from all sides of the inequality. $$→-5-10<- \frac{3}{2}x +10-10<5-10→-15<- \frac{3}{2}x x<-5$$
Multiply all sides by 2. $$→2×(-15)<2×(-\frac{3x}{2})<2×(-5)→-30<-3x<-10$$ Divide all sides by $$-3$$. (Remember that when you divide all sides of an inequality by a negative number, the inequality sing will be swapped. < becomes >)
$$→\frac{-30}{-3}>\frac{-3x}{-3}>\frac{-10}{-3}$$
$$\frac{10}{3}\ < x <10$$

5- 1
The intersection of two functions is the point with 2 for $$x$$. Then:
$$f(2)=g(2) \space and \space g(2)=(2×(2))-3=4-3=1$$
$$Then, f(2)=1→a(2)^2+b(2)+c=1→4a+2b+c=1 (i)$$
The value of x in the vertex of the parabola is:
$$x=- \frac{b}{2a}→-2=- \frac{b}{2a}→b=4a \space (ii)$$
In the point (-2, 5), the value of the $$f(x)$$ is 5.
$$f(-2)=5→a(-2)^2+b(-2)+c=5→4a-2b+c=5 (iii)$$
Using the first two equation:
$$4a+2b+c=1$$
$$4a-2b+c=5$$
Equation 1 minus equation 2 is:
$$(i)-(iii) →4b=-4→b=-1 \space \space (iv)$$
Plug in the value of b in the second equation:
$$b=4a →a =\frac{b}{4}= – \frac{1}{4}$$
Plug in the values of a and be in the first equation. Then:
$$4 (-\frac{1}{4}) +2(-1)+c=1→-1-2+c=1→c=1+3→c=4$$
the product of a, b and c= $$-\frac{1}{4}) ×(-1)×4=1$$

6- 60
The relationship among all sides of special right triangle
$$30^\circ-60^\circ- 90^\circ$$ is provided in this triangle:

In this triangle, the opposite side of $$30^\circ$$ angle is half of the hypotenuse.

Draw the shape of this question:
The latter is the hypotenuse. Therefore, the latter is 60 ft.

7- 3
Let $$x$$ be the length of an edge of cube, then the volume of a cube is: $$V=x^3$$
The surface area of cube is:
$$SA=6x^2$$
The volume of cube A is $$1/2$$ of its surface area. Then:
$$x^3 = \frac{6x^2}{2}→x^3=3x^2$$
divide both side of the equation by $$x^2$$. Then:
$$\frac{x^3}{x^2} = \frac{3x^2}{x^2} →x=3$$

8- 5
Multiply both sides by $$x$$.
$$x×(3x+6y)=x× (\frac{-3y^2+15}{x})→3x^2+6xy=-3y^2+15$$
$$→3x^2+6xy+3y^2=15→3×(x^2+2xy+y^2 )=15→x^2+2xy+y^2= \frac{15}{3}$$
$$x^2+2xy+y^2=(x+y)^2, Then:$$
$$→(x+y)^2=5$$

9- D
$$3x – 5= 8.5 → 3x = 8.5 + 5 = 13.5 → x = \frac{13.5}{3}= 4.5$$
Then; $$5x + 3 = 5 (4.5) + 3 = 22.5 + 3 = 25.5$$

10- B
Number of biology book: $$35$$
Total number of books; $$35+95+80=210$$
the ratio of the number of biology books to the total number of books is:
$$\frac{35}{210}= \frac{1}{6}$$

11- B
$$α=180^\circ-112^\circ=68^\circ$$
$$β=180^\circ-135^\circ=45^\circ$$
$$x+α+β=180^\circ→x=180^\circ-68^\circ-45^\circ=67^\circ$$

12- D
A. $$f(x)=x^2-5 \space if \ x=1→f(1)=(1)^2-5=1-5=-4≠5$$
B. $$f(x)=x^2-1 \space if \ x=1→f(1)=(1)^2-1=1-1=0≠5$$
C. $$f(x)=\sqrt{(x+2)} \space if \ x=1→f(1)=\sqrt{(1+2)}=\sqrt 3≠5$$
D. $$f(x)=\sqrt{x}+4 \space if \ x=1→f(1)=\sqrt 1+4=5$$

13- D
$$xp+2yq=26→xp=26-2yq \space (1)$$
$$xp+yq=17 \space (2)$$
$$(1) \space in \space (2) →26-2yq+yq=17→26-yq=17→yq=26-17=9$$

14- D
Let $$x$$ be all expenses, then
$$\frac{22}{100}x =660 →x= \frac{100×660}{22}=3000$$
He spent for his rent: $$\frac{27}{100}×3000 = 810$$

15- A
$$12x^2+n=a(x^2+3)(x^2-3)=ax^4-9a→a=12$$
And
$$n=-9a=-9×12=-108$$

16- C
$$\frac{1}{8}= 0.125→C=5$$
$$\frac{1}{20}=0.05→D=5→C×D=5×5=25$$

17- C
Let P be circumference of circle A, then;
$$2πr_{A}=18π→r_{A}=9$$
$$r_{A} = 3 r_{B}→r_{B}= \frac{9}{3} = 3$$
→ Area of circle B is;
$$πr^2_{B}=9π$$

18- B
$$f(x)=x^2+2x-5$$
$$f(3t^2 )=(3t^2 )^2+2(3t^2 )-5=9t^4+6t^2-5$$

19- C
$$y$$ is the intersection of the three circles. Therefore, it must be odd (from circle A), negative (from circle B), and multiple of 5 (from circle C).
From the options, only$$-5$$ is odd, negative and multiple of 5.

20- C
let $$x$$ be total number of marbles in the box, then number of red marbles is: $$x – 132$$
$$p = \frac{1}{4}= \frac{x – 132}{x}$$
Use cross multiplication to solve for $$x$$.
$$x=4(x-132)→x=4x-528→3x=528→x=176$$

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