NAEP Mathematics Grade 3 — Questions and Answers
Question 1: What is 15% of 200?
- 25
- 30 (Correct answer)
- 35
- 15
Correct answer: 30
15% of 200 = 0.15 × 200 = 30.
Question 2: A car travels 240 miles in 4 hours. What is its average speed in miles per hour?
- 50 mph
- 60 mph (Correct answer)
- 55 mph
- 70 mph
Correct answer: 60 mph
Speed = distance ÷ time = 240 ÷ 4 = 60 miles per hour.
Question 3: Which of the following numbers is a prime number?
- 27
- 33
- 41 (Correct answer)
- 49
Correct answer: 41
41 is prime because it has no factors other than 1 and itself.
Question 4: Simplify the expression: 3x + 5x − 2x
- 6x (Correct answer)
- 10x
- 8x
- 4x
Correct answer: 6x
Combine like terms: 3x + 5x − 2x = 6x.
Question 5: A bag contains 5 red marbles and 3 blue marbles. What is the probability of randomly selecting a blue marble?
- 3/5
- 5/8
- 3/8 (Correct answer)
- 1/3
Correct answer: 3/8
Probability = favorable outcomes ÷ total outcomes = 3 ÷ 8 = 3/8.
Question 6: The table shows that for every 3 cups of flour, a recipe needs 2 eggs. How many eggs are needed for 12 cups of flour?
- 6
- 8 (Correct answer)
- 9
- 4
Correct answer: 8
12 cups ÷ 3 cups = 4 groups, and 4 × 2 eggs = 8 eggs.
Question 7: What is the least common multiple (LCM) of 4 and 6?
- 24
- 18
- 12 (Correct answer)
- 8
Correct answer: 12
Multiples of 4: 4, 8, 12... and multiples of 6: 6, 12... the smallest common multiple is 12.
