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NMC-CBT Drug Calculations and Numeracy Flashcards

7 cards from real NMC CBT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 NMC-CBT Drug Calculations and Numeracy flashcards as text

  1. A patient has a fluid balance of +800 mL intake and -500 mL output over 24 hours. What is the net fluid balance?

    Answer: +300 mL

    Net balance = intake minus output = 800 − 500 = +300 mL.

  2. A prescription reads: paracetamol 1 g QDS for 5 days. How many 500 mg tablets are needed in total?

    Answer: 40 tablets

    1 g = 2 tablets; QDS = 4 times daily; 2 × 4 × 5 = 40 tablets.

  3. A syringe driver is set to deliver 24 mL over 24 hours. How many mL per hour does the patient receive?

    Answer: 1 mL/hr

    24 mL ÷ 24 hr = 1 mL/hr.

  4. Methotrexate is prescribed at 12.5 mg/m² for a patient with a body surface area of 1.6 m². What is the total dose?

    Answer: 20 mg

    12.5 × 1.6 = 20 mg.

  5. A nurse prepares an IV infusion of potassium chloride. The maximum recommended IV rate is 10 mmol/hr. If a bag contains 40 mmol in 1000 mL, what is the maximum safe flow rate in mL/hr?

    Answer: 250 mL/hr

    Concentration = 40 mmol ÷ 1000 mL = 0.04 mmol/mL; max rate = 10 ÷ 0.04 = 250 mL/hr.

  6. A patient's BMI is calculated as weight (kg) divided by height (m) squared. A patient weighs 80 kg and is 1.6 m tall. What is their BMI?

    Answer: 31.25

    80 ÷ (1.6 × 1.6) = 80 ÷ 2.56 = 31.25.

  7. A patient requires 500 mg of co-amoxiclav. Available tablets are 250/125 mg (co-amoxiclav ratio). How many tablets are needed to deliver 500 mg of amoxicillin component?

    Answer: 2 tablets

    Each tablet contains 250 mg amoxicillin; 500 ÷ 250 = 2 tablets.