Questions, Formulas & Correct Answers |
Complete Math Exam Prep
1.
A car travels 240 miles in 4 hours. What is its average speed?
A. 50 mph
B. 60 mph
C. 70 mph
D. 80 mph
Correct Answer: B. 60 mph
Rationale:
Speed = Distance ÷ Time = 240 ÷ 4 = 60 mph.
2.
A worker earns $18 per hour and works 35 hours in one week. How much does the worker earn
before deductions?
A. $530
B. $600
C. $630
D. $650
Correct Answer: C. $630
Rationale:
35 × $18 = $630.
3.
A jacket originally costs $80 and is discounted by 25%. What is the sale price?
A. $20
B. $55
,C. $60
D. $65
Correct Answer: C. $60
Rationale:
25% of $80 = $20.
$80 − $20 = $60.
4.
A machine produces 45 parts every 3 minutes. At the same rate, how many parts will it produce
in 10 minutes?
A. 120
B. 135
C. 150
D. 180
Correct Answer: C. 150
Rationale:
Rate = 45 ÷ 3 = 15 parts/minute.
15 × 10 = 150 parts.
5.
A tank contains 72 gallons of water. If ⅓ of the water is removed, how many gallons remain?
A. 24 gallons
B. 36 gallons
C. 48 gallons
D. 54 gallons
Correct Answer: C. 48 gallons
Rationale:
⅓ of 72 = 24.
72 − 24 = 48 gallons.
,6.
A truck uses 12 gallons of fuel to travel 240 miles. At the same rate, how many gallons are
needed to travel 400 miles?
A. 16 gallons
B. 18 gallons
C. 20 gallons
D. 24 gallons
Correct Answer: C. 20 gallons
Rationale:
240 miles ÷ 12 gallons = 20 miles/gallon.
400 ÷ 20 = 20 gallons.
7.
A class has 30 students. If 40% are absent, how many students are present?
A. 12
B. 16
C. 18
D. 20
Correct Answer: C. 18
Rationale:
40% of 30 = 12 absent.
30 − 12 = 18 present.
8.
A recipe requires 3 cups of flour to make 12 servings. How much flour is needed for 20 servings?
A. 4 cups
B. 5 cups
C. 6 cups
D. 7 cups
Correct Answer: B. 5 cups
, Rationale:
3 ÷ 12 = 0.25 cup per serving.
0.25 × 20 = 5 cups.
9.
A store buys an item for $50 and sells it for $65. What is the profit?
A. $10
B. $12
C. $15
D. $20
Correct Answer: C. $15
Rationale:
Profit = Selling price − Cost price.
$65 − $50 = $15.
10.
A student scores 78, 84, 91, and 87 on four tests. What is the average score?
A. 82
B. 83
C. 85
D. 88
Correct Answer: C. 85
Rationale:
78 + 84 + 91 + 87 = 340.
340 ÷ 4 = 85.
11.
A rectangular field is 45 meters long and 20 meters wide. What is its area?
A. 450 m²
B. 650 m²