# GED Practice Questions: Mathematical Reasoning

Preparing for the GED? Try your hand at a few Mathematical Reasoning practice questions. These practice questions deal mainly with the basic mathematical functions you’ll need to master in order to do well on the GED; keep in mind that there are other, more advanced topics you’ll need to study as well.

GED Mathematical Reasoning Answer 1

12,011 r8

GED Mathematical Reasoning Answer 2

**C. 350**

Calculate: 3 × 150 = 450 sheets will be used. Since the paper sells in packages of 400 sheets, 2 packages are needed, and 2 × 400 = 800. 800 − 450 = 350 sheets left over.

GED Mathematical Reasoning Answer 3

**A.** **$1500**

Calculate: (6 × $750) − $3000 = $1500.

GED Mathematical Reasoning Answer 4

**90 miles per hour**

d/t = r

270/3 = 90

GED Mathematical Reasoning Answer 5

**A.** **32**

c/r = n

$640/$20 = 32

GED Mathematical Reasoning Answer 6

**C.** **$656**

You can use your calculator. Multiply: $3280 × 20% = $656

GED Mathematical Reasoning Answer 7

**D. 3x − y**

Distribute the negative sign. Then identify, group, and combine like terms:

(x + y + z) − (−2x + 2y + z)

= x + y + z + 2x − 2y − z

= x + 2x + y − 2y + z − z

= 3x − y

GED Mathematical Reasoning Answer 8

**-2**

GED Mathematical Reasoning Answer 9

**A. (2, –1)**

Isolate x in the first equation. x = 2y + 4. Then, substitute into the second equation to find a value for y.

6y + 5(2y + 4) = 4

16y + 20 = 4

y = −1

Finally, use that value of y in the first equation to find a value for x.

x = 2(−1) + 4 = 2

GED Mathematical Reasoning Answer 10

**a. $99**

** b. $265**

GED Mathematical Reasoning Answer 11

**C. 67 **

You know that the height of the cone is half of the diameter of the base. Since the radius of the base is also half of the diameter, the radius must equal the height. Therefore, the radius is 4. Now solve the equation: V= 1/3 x π x 4^2 x 4≈ 67

Click here for more information about the mathematical reasoning portion of the GED!