10 Most Common HiSET Math Questions

B. \(234 cm^2\)

C. \(216 cm^2\)

D. \(154 cm^2\)

E. \(130 cm^2\)

4- Two-thirds of 18 is equal to \(\frac{2}{5}\) of what number?

A. 12

B. 20

C. 30

D. 60

E. 90

5- The marked price of a computer is D dollar. Its price decreased by \(20\%\) in January and later increased by \(10 \%\) in February. What is the final price of the computer in D dollars?

A. 0.80 D

B. 0.88 D

C. 0.90 D

D. 1.20 D

E. 1.40 D

6- The area of a circle is \(64 π\). What is the circumference of the circle?

A. \(8 π\)

B. \(16 π\)

C. \(32 π\)

D. \(64 π\)

E. \(124 π\)

7- A \($40\) shirt now selling for \($28\) is discounted by what percent?

A. \(20 \%\)

B. \(30 \%\)

C. \(40 \%\)

D. \(60 \%\)

E. \(80 \%\)

8- In 1999, the average worker’s income increased by $2,000 per year starting from $24,000 annual salary. Which equation represents income greater than average? (\(I =\) income, \(x =\) number of years after 1999)

A. \(I > 2000 x + 24000\)

B. \(I > – 2000 x + 24000\)

C. \(I < –2000 x + 24000\)

D. \(I < 2000 x – 24000\)

E. \(I < 24,000 x + 24000\)

9- From last year, the price of gasoline has increased from $1.25 per gallon to $1.75 per gallon. The new price is what percent of the original price?

A. \(72 \%\)

B. \(120 \%\)

C. \(140 \%\)

D. \(160 \%\)

E. \(180 \%\)

10- A boat sails 40 miles south and then 30 miles east. How far is the boat from its start point?

A. 45 miles

B. 50 miles

C. 60 miles

D. 70 miles

E. 80 miles

Best HiSET Math Prep Resource for 2026

The Most Comprehensive HiSET Math Preparation Bundle Includes HiSET Math Prep Books, Workbooks, and Practice Tests

Download

$64.99 Original price was: $64.99.$36.99Current price is: $36.99.

Rated 4.39 out of 5 based on 98 customer ratings

Satisfied 88 Students

Answers:

2- C
Use percent formula:
\(part = \frac{percent}{100} × whole\)
\(25 = \frac{percent}{100} × 20 ⇒ 25 = \frac{percent ×20}{100}\)
\(⇒ 25 = \frac{percent ×2}{10}\)
multiply both sides by 10.
\(4250 = percent ×2, divide \space both \space sides \space by \space 2. \)
\(125 = percent\)

3- E
The perimeter of the trapezoid is 54.
Therefore, the missing side (height) is \(= 54 – 18 – 12 – 14 = 10\)
Area of the trapezoid:
\(A = \frac{1}{2}h (b_{1} + b_{2}) = \frac{1}{2}(10)(12 + 14) = 130\)

4- C
Let \(x\) be the number. Write the equation and solve for \(x\).
\(\frac{2}{3} ×18=\frac{2}{5} ⇒\frac{2×18}{3} = \frac{2x}{5} \)
use cross multiplication to solve for \(x\).
\(5×36=2x×3 ⇒180=6x ⇒ x=30\)

5- B
To find the discount, multiply the number by \((100\% – rate of discount)\).
Therefore, for the first discount we get: (D) \((100\% – 20\%) =\) (D) \((0.80) = 0.80\) D
For increase of \(10 \%:\) (0.85 D) \((100\% + 10\%) =\) (0.85 D) \((1.10) = 0.88\) D \(= 88\%\) of D

6- B
Use the formula of areas of circles.
\(Area = πr^2 ⇒ 64 π = πr^2 ⇒ 64 = r^2 ⇒ r = 8\)
The radius of the circle is 8. Now, use the circumference formula:
Circumference \(= 2πr = 2π (8) = 16 π\)

7- B
Use the formula for Percent of Change
\(\frac{New \space Value-Old \space Value}{Old \space Value}× 100 \%\)
\(\frac{28-40}{40}× 100 \% = –30 \%\)
(negative sign here means that the new price is less than the old price).

8- A
Let \(x\) be the number of years. Therefore, $2,000 per year equals \(2000x\).
starting from $24,000 annual salary means you should add that amount to \(2000x\).
Income more than that is:
\(I > 2000 x + 24000\)

9- C
The question is this: 1.75 is what percent of 1.25?
Use percent formula:
\(part =\frac{percent}{100}× whole\)
\(1.75 =\frac{percent}{100}× 1.25\)
\(1.75 =\frac{percent ×1.25}{100} \)
\(175 = percent ×1.25 ⇒\)
\(percent = \frac{175}{1.25}= 140\)

10- B
Use the information provided in the question to draw the shape.
Use Pythagorean Theorem: \(a^2 + b^2 = c^2\)
\(40^2 + 30^2 = c^2 ⇒ 1600 + 900 = c^2 ⇒ 2500 = c^2 ⇒ c = 50\)

The Best Quick Study Guide for the HiSET Math Test

HiSET Math in 10 Days The Most Effective HiSET Math Crash Course

Download

$32.99 Original price was: $32.99.$21.44Current price is: $21.44.

Rated 4.44 out of 5 based on 218 customer ratings

Satisfied 203 Students

High School Equivalency Tests

Looking for the best resource to help you succeed on the HiSET Math test?

The Best Books to Ace the HiSET Math Test

HiSET Math Study Guide Step-By-Step Guide to Preparing for the HiSET Math Test

Download

$20.99 Original price was: $20.99.$16.99Current price is: $16.99.

Rated 4.43 out of 5 based on 58 customer ratings

Satisfied 49 Students