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An automobile travels 240 miles in 4 hours. What is its
average speed?
A. 50 mph
B. 55 mph
C. 60 mph
D. 65 mph
Correct Answer: C
Rationale: Average speed = distance ÷ time = 240 miles ÷
4 hours = 60 miles per hour.
If 3x + 7 = 22, then x equals:
A. 3
B. 4
C. 5
,D. 6
Correct Answer: C
Rationale: Subtract 7 from both sides: 3x = 15. Divide by
3: x = 5.
A box contains 15 red marbles, 10 blue marbles, and 5
green marbles. What is the probability of randomly
selecting a blue marble?
A. 1/3
B. 1/2
C. 1/4
D. 2/5
Correct Answer: A
Rationale: Total marbles = 15+10+5 = 30. Probability =
favorable outcomes / total = 10/30 = 1/3.
What is the square root of 144?
A. 10
B. 11
C. 12
,D. 13
Correct Answer: C
Rationale: 12 × 12 = 144, so the square root is 12.
A rectangle has a length of 12 cm and a width of 5 cm.
What is its area?
A. 34 cm²
B. 40 cm²
C. 48 cm²
D. 60 cm²
Correct Answer: D
Rationale: Area = length × width = 12 cm × 5 cm = 60 cm².
Which of the following is a prime number?
A. 21
B. 33
C. 47
D. 49
Correct Answer: C
, Rationale: A prime number has exactly two distinct
positive divisors: 1 and itself. 47 is not divisible by any
number other than 1 and 47.
If 20% of a number is 30, what is the number?
A. 100
B. 120
C. 150
D. 200
Correct Answer: C
Rationale: 0.20 × N = 30 → N = 30 ÷ 0.20 = 150.
Simplify: 5(2x + 3) - 4x
A. 6x + 15
B. 6x + 3
C. 10x + 15 - 4x
D. 6x + 15
Correct Answer: D
Rationale: 5(2x+3) = 10x+15. Then 10x+15-4x = 6x+15.