ISAT Quantitative Reasoning with Units 4 — Questions and Answers
Question 1: A hospital administers a drug at 2.5 mg per kg of body weight. A patient weighs 176 pounds. What is the correct dose in mg? (1 kg ≈ 2.2 lbs)
- 200 mg (Correct answer)
- 440 mg
- 80 mg
- 176 mg
Correct answer: 200 mg
176 lbs ÷ 2.2 = 80 kg; 80 × 2.5 = 200 mg.
Question 2: Light travels at approximately 3 × 10⁸ meters per second. How many kilometers does light travel in one minute?
- 18,000,000 km (Correct answer)
- 1,800,000 km
- 300,000 km
- 180,000,000 km
Correct answer: 18,000,000 km
3 × 10⁸ m/s × 60 s = 1.8 × 10¹⁰ m = 18,000,000 km.
Question 3: A scientist measures a sample mass as 0.0045 kg. Express this in milligrams.
- 4,500 mg (Correct answer)
- 45 mg
- 450 mg
- 45,000 mg
Correct answer: 4,500 mg
0.0045 kg × 1,000,000 mg/kg = 4,500 mg.
Question 4: An athlete's heart beats 72 times per minute during rest. How many times does it beat in one week?
- 725,760 (Correct answer)
- 72,576
- 10,080
- 1,080
Correct answer: 725,760
72 × 60 × 24 × 7 = 725,760 beats.
Question 5: A rainfall gauge records 45 mm of rain over 3 hours. What is the rainfall rate in centimeters per hour?
- 1.5 cm/h (Correct answer)
- 15 cm/h
- 0.15 cm/h
- 150 cm/h
Correct answer: 1.5 cm/h
45 mm ÷ 3 h = 15 mm/h = 1.5 cm/h.
Question 6: A pipe leaks at 0.25 liters per minute. How many gallons leak in one day? (1 gallon ≈ 3.785 liters)
- approximately 95.1 gallons (Correct answer)
- approximately 360 gallons
- approximately 951 gallons
- approximately 9.5 gallons
Correct answer: approximately 95.1 gallons
0.25 × 1,440 min = 360 L per day; 360 ÷ 3.785 ≈ 95.1 gallons.
Question 7: A rectangle measures 2.4 m by 1.8 m. What is its area in square centimeters?
- 43,200 cm² (Correct answer)
- 4,320 cm²
- 432 cm²
- 4.32 cm²
Correct answer: 43,200 cm²
2.4 m = 240 cm, 1.8 m = 180 cm; 240 × 180 = 43,200 cm².
ISAT Quantitative Reasoning with Units 4
A hospital administers a drug at 2.5 mg per kg of body weight.
A patient weighs 176 pounds.
What is the correct dose in mg? (1 kg ≈ 2.2 lbs)