OAR OAR Math Skills 3 — Questions and Answers
Question 1: What is the median of the data set: 4, 7, 9, 2, 11, 6, 3?
- 4
- 5
- 6 (Correct answer)
- 7
Correct answer: 6
Arranged in order: 2, 3, 4, 6, 7, 9, 11 — the middle value is 6.
Question 2: A store sells a jacket for $85 after applying a 15% discount. What was the original price?
- $97.75
- $100.00 (Correct answer)
- $100.75
- $102.50
Correct answer: $100.00
85 = 0.85 × original price, so original = 85 / 0.85 = $100.
Question 3: What is the slope of the line passing through points (2, 3) and (6, 11)?
- 1
- 2 (Correct answer)
- 3
- 4
Correct answer: 2
Slope = (11 − 3) / (6 − 2) = 8 / 4 = 2.
Question 4: Evaluate: 18 − 3 × (4 + 2) ÷ 6
- 12
- 15 (Correct answer)
- 9
- 16
Correct answer: 15
Following order of operations: 3 × 6 = 18, 18 ÷ 6 = 3, then 18 − 3 = 15.
Question 5: A container holds 3.5 liters. How many 250 mL servings can it provide?
- 12
- 13
- 14 (Correct answer)
- 16
Correct answer: 14
3.5 L = 3500 mL; 3500 ÷ 250 = 14 servings.
Question 6: The ratio of boys to girls in a class is 3:4. If there are 28 girls, how many boys are there?
- 18
- 21 (Correct answer)
- 24
- 27
Correct answer: 21
If 4 parts = 28 girls, 1 part = 7; boys = 3 × 7 = 21.
Question 7: Which expression is equivalent to 2(3a − 5) + 4a?
- 6a − 10 + 4a
- 10a − 10 (Correct answer)
- 10a − 5
- 6a + 4a − 5
Correct answer: 10a − 10
Distribute: 6a − 10 + 4a = 10a − 10.
OAR OAR Math Skills 3
What is the median of the data set: 4, 7, 9, 2, 11, 6, 3?