PAX PAX (NLN) 4 — Questions and Answers
Question 1: A train travels 180 miles in 3 hours. At the same speed, how long will it take to travel 300 miles?
- 4 hours
- 4.5 hours
- 5 hours (Correct answer)
- 5.5 hours
Correct answer: 5 hours
Speed = 180/3 = 60 mph; time = 300/60 = 5 hours.
Question 2: Which blood type is considered the universal donor for red blood cells?
- Type A
- Type B
- Type AB
- Type O negative (Correct answer)
Correct answer: Type O negative
Type O negative blood lacks A, B, and Rh antigens, so it can be donated to anyone.
Question 3: Choose the word that best completes the sentence: 'The doctor remained _____ despite the chaotic emergency room.'
- agitated
- composed (Correct answer)
- erratic
- indifferent
Correct answer: composed
'Composed' means calm and in control, which fits the contrast with a chaotic environment.
Question 4: What is the charge of a neutron?
- Positive
- Negative
- Neutral (Correct answer)
- Variable
Correct answer: Neutral
Neutrons carry no electrical charge; they are electrically neutral particles found in the nucleus.
Question 5: Simplify: 4(3x − 2) + 5x
- 12x − 8 + 5x
- 17x − 8 (Correct answer)
- 12x − 3
- 7x − 8
Correct answer: 17x − 8
Distribute: 12x − 8 + 5x = 17x − 8.
Question 6: Which prefix means 'against' or 'opposite'?
- hypo-
- anti- (Correct answer)
- poly-
- peri-
Correct answer: anti-
'Anti-' means against or opposite, as in antibiotic (against bacteria).
Question 7: Which chamber of the heart pumps oxygenated blood to the entire body?
- Right atrium
- Left atrium
- Right ventricle
- Left ventricle (Correct answer)
Correct answer: Left ventricle
The left ventricle pumps oxygenated blood through the aorta to the systemic circulation.
PAX PAX (NLN) 4
A train travels 180 miles in 3 hours.
At the same speed, how long will it take to travel 300 miles?