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Medical Mathematics Quiz

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#1

What is the formula for calculating BMI (Body Mass Index)?

Weight (kg) / (Height (m))^2
Explanation

Ratio of weight to height squared.

#2

If a patient is prescribed 2 tablets of medication every 6 hours, how many tablets will they take in 24 hours?

12 tablets
Explanation

Simple multiplication of dosage frequency.

#3

If a patient's respiratory rate is 18 breaths per minute, what is the duration of each respiratory cycle in seconds?

3.0 seconds
Explanation

Time for one complete inhalation and exhalation cycle.

#4

If a patient's temperature is 38.5°C, what is their temperature in Fahrenheit?

101.3°F
Explanation

Conversion from Celsius to Fahrenheit.

#5

A patient's heart rate is 80 beats per minute. What is the duration of each cardiac cycle in seconds?

0.80 seconds
Explanation

Time for one complete heartbeat cycle.

#6

What is the percentage concentration of a solution containing 30g of solute dissolved in 300ml of solvent?

10%
Explanation

Dividing solute mass by total solution volume.

#7

If a patient's blood pressure reading is 120/80 mmHg, what is their mean arterial pressure (MAP)?

100 mmHg
Explanation

Average pressure during one cardiac cycle.

#8

What is the half-life of a drug if its elimination rate constant (K) is 0.05 per hour?

5 hours
Explanation

Time taken for drug concentration to decrease by half.

#9

If a solution has an osmolality of 300 mOsm/kg, what is its osmolarity in mOsm/L?

300 mOsm/L
Explanation

Osmolality equals osmolarity in solutions without particles that dissociate.

#10

What is the formula for calculating the absolute neutrophil count (ANC)?

WBC count * percentage of neutrophils
Explanation

Total number of neutrophils in blood.

#11

A medication is prescribed at a dose of 0.1 mg/kg/day. If a patient weighs 70 kg, what is their daily dose in milligrams?

7 mg/day
Explanation

Weight-based calculation for total daily dosage.

#12

A patient receives 500 mL of IV fluid over 4 hours. What is the flow rate in mL/hour?

125 mL/hour
Explanation

Total volume divided by time.

#13

What is the formula for calculating creatinine clearance (CrCl) using the Cockcroft-Gault equation?

(140 - Age) * Weight (kg) / (72 * Serum creatinine)
Explanation

Estimates kidney function based on age, weight, and creatinine level.

#14

What is the formula for calculating the corrected QT interval (QTc) using Bazett's formula?

QT interval / √RR interval
Explanation

Corrects QT interval for heart rate variability.

#15

A patient's ideal body weight (IBW) is calculated to be 60 kg using the Devine formula. If the patient weighs 75 kg, what is their percentage of IBW?

120%
Explanation

Ratio of actual weight to ideal weight.

#16

What is the formula for calculating the corrected calcium level?

Serum calcium + (0.8 * [4 - Serum albumin])
Explanation

Adjusts calcium for albumin concentration.

#17

What is the formula for calculating the corrected phenytoin level in the presence of hypoalbuminemia?

Measured phenytoin level / (0.2 * Serum albumin + 0.1)
Explanation

Corrects phenytoin level for albumin concentration.

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