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Quizzes > Health & Medicine

HOSA Medical Math Practice Test: 20 Questions to Sharpen Skills

Quick quiz with HOSA medical math practice questions. Instant results.

Editorial: Review CompletedCreated By: Sarah CadmanUpdated Aug 26, 2025
Difficulty: Moderate
Grade: Grade 10
Study OutcomesCheat Sheet
Colorful paper art promoting HOSA Medical Math Mastery practice quiz for high school students.

This HOSA medical math practice test helps you build speed and accuracy with dosage, metric conversions, and IV flow rates. Work through 20 quick questions and get instant feedback to see what to review before competition or clinical training. If you're prepping for other events, try our hosa bowl practice test, review CPR skills with a hosa cpr test, or refresh basics with a basic math quiz.

If an IV bag contains 1 liter of solution, how many milliliters does it hold?
500 mL
100 mL
10000 mL
1000 mL
Since 1 liter is equivalent to 1000 milliliters, the correct answer is 1000 mL. This basic conversion is essential in medical dosing calculations.
A prescription requires a dosage of 250 mg and each tablet contains 50 mg. How many tablets are needed?
7 tablets
5 tablets
3 tablets
6 tablets
Dividing the total dosage (250 mg) by the dose per tablet (50 mg) gives 5 tablets. This ensures the patient receives the correct dose.
What is the standard unit for measuring liquid medications?
Milliliters
Inches
Tablets
Grams
Liquid medications are typically measured in milliliters, as it accurately reflects the volume of fluid. This standard measuring unit is crucial in ensuring proper dosage.
What is the correct conversion of 2000 milligrams to grams?
0.2 grams
200 grams
20 grams
2 grams
Since 1000 mg equals 1 gram, 2000 mg is equivalent to 2 grams. Understanding this conversion is key in preparing medications.
If a medication dosage is 5 mL every 4 hours, how many mL will be administered in 24 hours?
25 mL
35 mL
20 mL
30 mL
There are 6 dosing intervals in 24 hours (24 divided by 4 equals 6). Multiplying 6 by 5 mL gives a total of 30 mL for the day.
A medication label states 0.5 mg per 10 mL. How many milligrams are in 20 mL of this solution?
1 mg
1.5 mg
2 mg
0.5 mg
The concentration is 0.5 mg per 10 mL, so 20 mL contains twice the amount, which is 1 mg. This proportion is fundamental in dosing calculations.
A doctor orders 0.2 mg of a drug per kg of body weight. For a patient weighing 50 kg, what is the total dose required?
15 mg
20 mg
5 mg
10 mg
Multiplying 0.2 mg by 50 kg yields 10 mg, providing the correct dose based on the patient's weight. This calculation highlights the importance of weight-based dosing.
An IV infusion is set at a rate of 120 mL/hr. How many mL will be infused in 3 hours?
300 mL
480 mL
360 mL
240 mL
At 120 mL/hr, over 3 hours, the total volume infused is 120 mL x 3 = 360 mL. This question reinforces time-volume relationships in IV therapy.
A medication comes in a concentration of 100 mg per 5 mL. How many mL are needed to deliver a 250 mg dose?
15 mL
12.5 mL
10 mL
20 mL
Using the ratio (250 mg x 5 mL) / 100 mg, you need 12.5 mL to deliver a 250 mg dose. This proportional reasoning is essential in medication preparation.
A solution has a concentration of 2% w/v. How many grams of solute are in 100 mL of the solution?
2 grams
0.2 grams
20 grams
0.02 grams
A 2% w/v solution means there are 2 grams of solute per 100 mL of solution. This calculation is fundamental in preparing solutions in clinical settings.
If a drug dosage is 1.5 mg administered intravenously and the infusion bag contains 50 mg in 250 mL, how many mL must be given to deliver the correct dose?
10 mL
5 mL
7.5 mL
15 mL
The concentration is 50 mg/250 mL, or 0.2 mg/mL. Dividing 1.5 mg by 0.2 mg/mL yields 7.5 mL required for the dose. This demonstrates the use of unit rates.
In an IV setup with a drop factor of 20 drops/mL, how many drops per minute are needed to infuse 60 mL over 1 hour?
40 drops/min
10 drops/min
20 drops/min
30 drops/min
60 mL over 60 minutes equals 1 mL per minute, and with a drop factor of 20, the infusion rate becomes 20 drops per minute. It's a straightforward conversion.
A medication is delivered over 30 minutes at a rate of 2 mL/min. What is the total volume administered?
60 mL
45 mL
90 mL
30 mL
At a rate of 2 mL/min for 30 minutes, the total volume administered is 2 x 30 = 60 mL. This question reinforces the relationship between rate and time.
A vial contains 500 mg of medication in 5 mL. What is the concentration of the medication in mg per mL?
50 mg/mL
100 mg/mL
10 mg/mL
250 mg/mL
Dividing 500 mg by 5 mL gives a concentration of 100 mg/mL. Understanding concentration helps in adjusting doses accurately.
A nurse dilutes 250 mg of medication in 100 mL saline. What is the final concentration in mg/mL?
0.25 mg/mL
25 mg/mL
2.5 mg/mL
250 mg/mL
The concentration is calculated by dividing 250 mg by 100 mL, which equals 2.5 mg/mL. This dilution calculation is critical in safe medication administration.
An IV infusion requires administering 1000 mL over 8 hours using a drop factor of 15 drops/mL. How many drops per minute are needed?
31 drops/min
25 drops/min
37 drops/min
42 drops/min
First, calculate the rate: 1000 mL over 480 minutes equals approximately 2.08 mL/min. Multiplying 2.08 by 15 yields roughly 31.25 drops/min, which rounds to 31 drops/min. This multi-step problem emphasizes unit conversions and rounding.
A chemotherapy protocol requires a dose of 2.2 mg/m² of body surface area (BSA). For a patient with a BSA of 1.8 m², what is the required dose?
4.4 mg
2 mg
4 mg
3.6 mg
Multiplying 2.2 mg/m² by 1.8 m² gives 3.96 mg, which rounds to 4 mg. Accurate dosing based on BSA is crucial in chemotherapy to minimize toxicity.
A medication is dosed at 0.05 mg per kg. If a pediatric patient weighs 15 lbs, and 1 kg is approximately 2.2 lbs, what is the appropriate dose?
0.30 mg
0.45 mg
0.25 mg
0.34 mg
First convert 15 lbs to kilograms by dividing by 2.2, which is about 6.82 kg. Then, multiplying 6.82 kg by 0.05 mg/kg yields approximately 0.34 mg, ensuring accurate pediatric dosing.
A laboratory report shows a blood concentration of 4 mg/dL for a drug, with an estimated blood volume of 5 liters. What is the total amount of the drug in the bloodstream in milligrams? (Hint: 1 liter = 10 dL)
200 mg
400 mg
800 mg
40 mg
Converting 5 liters to deciliters gives 50 dL. Multiplying 50 dL by 4 mg/dL results in 200 mg. This calculation integrates unit conversion with proportion reasoning.
A solution is prepared by mixing 3 parts 0.9% saline with 7 parts dextrose solution, making a total of 500 mL. How much 0.9% saline is required?
50 mL
100 mL
150 mL
200 mL
The total parts in the mixture is 3 + 7 = 10. The saline portion is 3/10 of the total volume, so 3/10 x 500 mL equals 150 mL. This problem emphasizes ratio and proportion calculations.
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Study Outcomes

  1. Analyze and solve dosage calculation problems accurately.
  2. Apply unit conversion techniques in medical contexts.
  3. Evaluate test-style questions to identify common mathematical errors.
  4. Interpret ratios and proportions for clinical dose determinations.
  5. Understand key medical math principles essential for exam success.

HOSA Medical Math Practice Test Cheat Sheet

  1. Master Metric Conversions - Grasping that 1 kilogram equals 1,000 grams and 1 liter equals 1,000 milliliters is the backbone of medical math. Nailing these basics ensures you'll hit the correct dosage every time and avoid slippery calculation mistakes.
  2. Convert Household Measurements - Think of your kitchen as a mini pharmacy: 1 teaspoon is 5 mL and 1 ounce is 30 mL. These handy conversions turn confusing recipe-style dosages into clear, precise instructions.
  3. Pediatric Dosage with Clark's Rule - Use Clark's Rule (Child's Dose = [Weight in lb / 150] × Adult Dose) to tailor meds for little patients. This quick formula helps you adjust adult doses safely for kids, so you're always in the right ballpark.
  4. Infusion Rate Calculations - Calculate drip rates with Volume (mL) / Time (hr) = Rate (mL/hr). This ensures IV fluids and meds flow at just the right speed - no floods or famines in the veins!
  5. Dimensional Analysis Magic - Let units do the heavy lifting: cancel out unwanted measurements and watch conversions fall into place. It's like a party where only the right units get an invite, leaving no room for errors.
  6. Solution Strengths & Ratios - Decode 1:1000 (1 g in 1,000 mL) or understand that 5% means 5 g per 100 mL. Mastering these ratios and percentages makes mixing meds feel like alchemy.
  7. Temperature Conversions - Swap between Celsius and Fahrenheit with F = 1.8×C + 32 and C = (F - 32) / 1.8. Getting the temp right can be lifesaving in critical care scenarios.
  8. Body Surface Area (BSA) - Use BSA (m²) = √([Height(cm) × Weight(kg)] / 3600) to fine-tune chemo and other dose‑critical drugs. It's the golden ticket to personalized medication.
  9. Rounding Rules - Round 2.76 to 2.8 when going to the nearest tenth, and always follow institutional policies. Correct rounding keeps dosages safe and doesn't shortchange your patients.
  10. Medical Abbreviations & Symbols - Decode "mg" for milligrams, "mL" for milliliters, and beyond. Familiarity with these abbreviations stops misinterpretation dead in its tracks.
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