OAR OAR Math Skills: Arithmetic and Number Operations 1 — Questions and Answers
Question 1: What is the value of 3/4 + 5/8?
- 11/8 (Correct answer)
- 8/12
- 1/2
- 7/8
Correct answer: 11/8
Converting 3/4 to 6/8 and adding 5/8 gives 11/8.
Question 2: A sailor earns $2,400 per month. If 25% is withheld for taxes, what is the take-home pay?
- $1,800 (Correct answer)
- $1,600
- $2,000
- $1,200
Correct answer: $1,800
25% of $2,400 is $600, so take-home pay is $2,400 − $600 = $1,800.
Question 3: What is 0.045 expressed as a percentage?
- 4.5% (Correct answer)
- 0.45%
- 45%
- 0.045%
Correct answer: 4.5%
Multiplying 0.045 by 100 converts the decimal to 4.5%.
Question 4: Which of the following is the greatest common factor (GCF) of 48 and 36?
- 12 (Correct answer)
- 6
- 18
- 9
Correct answer: 12
The factors of 48 and 36 share 12 as their largest common divisor.
Question 5: If a ship travels 240 nautical miles in 8 hours, what is its average speed in knots?
- 30 knots (Correct answer)
- 24 knots
- 32 knots
- 28 knots
Correct answer: 30 knots
Speed = distance ÷ time = 240 ÷ 8 = 30 knots.
Question 6: What is the least common multiple (LCM) of 4, 6, and 9?
- 36 (Correct answer)
- 18
- 24
- 72
Correct answer: 36
The smallest number divisible by 4, 6, and 9 is 36.
OAR OAR Math Skills: Arithmetic and Number Operations 1
What is the value of 3/4 + 5/8?