Preparing for the NCLEX-RN (National Council Licensure Examination for Registered Nurses) exam? Math is one of the areas our deck drills hardest: 10 of its 1030 flashcards focus on math, covering topics like Regular Insulin, Magnesium Sulfate, Lactated Ringer. Try the sample questions below — every card is a real question-and-answer pair from the full deck.
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Order: 1,000 mL 0.9% NS over 8 hours. Drop factor: 15 gtt/mL. Calculate the flow rate in gtt/min. Round to the nearest whole number.
Show answer →Formula: (Total Volume in mL / Time in minutes) x Drop Factor = gtt/min. 1. Convert hours to minutes: 8 hr x 60 min = 480 min. 2. (1,000 mL / 480 min) x 15 gtt/mL = 31.25 gtt/min. 3. Round to whole number: 31 gtt/min. Exam Strategy: NCLEX requires rounding drops (gtt) to the nearest whole number because you cannot count a partial drop. Always convert time to minutes before applying the drip factor formula. Common distractor: forgetting to convert hours to minutes.
Order: Heparin 18 units/kg/hr. Patient: 198 lbs. Concentration: 25,000 units in 250 mL D5W. Calculate the infusion rate in mL/hr. Round to the nearest tenth.
Show answer →1. Weight: 198 lbs / 2.2 = 90 kg. 2. Units per hour: 90 kg x 18 units/kg/hr = 1,620 units/hr. 3. Concentration: 25,000 units / 250 mL = 100 units/mL. 4. mL/hr: 1,620 units/hr / 100 units/mL = 16.2 mL/hr. Exam Strategy: Heparin is a high-alert medication. NCLEX focuses on the safety of weight-based dosing. Always verify the concentration (units/mL) before calculating the pump rate. Rounding to the tenth is required for electronic infusion pumps.
Order: Dopamine 5 mcg/kg/min. Patient: 70 kg. Concentration: 400 mg in 250 mL D5W. Calculate the pump rate in mL/hr. Round to the nearest tenth.
Show answer →1. Total mcg/min: 5 mcg x 70 kg = 350 mcg/min. 2. Total mcg/hr: 350 mcg/min x 60 min = 21,000 mcg/hr. 3. Concentration in mcg: 400 mg = 400,000 mcg. 4. mL/hr: (21,000 mcg/hr / 400,000 mcg) x 250 mL = 13.125 mL/hr. 5. Round to tenth: 13.1 mL/hr. Exam Strategy: The most common error is failing to convert mg to mcg or minutes to hours. This is a multi-step titration style question common in critical care scenarios. Always check units!
Order: Regular Insulin 0.1 units/kg/hr. Patient: 110 lbs. Concentration: 100 units in 100 mL NS. After 2 hours, the nurse must increase to 0.15 units/kg/hr. What is the NEW rate in mL/hr? Round to the nearest tenth.
Show answer →1. Weight: 110 lbs / 2.2 = 50 kg. 2. New Dose: 50 kg x 0.15 units/kg/hr = 7.5 units/hr. 3. Concentration: 100 units / 100 mL = 1 unit/mL. 4. Rate: 7.5 units/hr / 1 unit/mL = 7.5 mL/hr. Exam Strategy: This is a change in status question. NCLEX provides the initial dose (0.1 units) as a distractor. Focus only on the data needed to solve for the NEW rate requested in the prompt.
Order: Magnesium Sulfate 2 g/hr continuous infusion. Available: 40 g in 1,000 mL Lactated Ringer's. Calculate the rate in mL/hr.
Show answer →1. Concentration: 40 g / 1,000 mL = 0.04 g/mL. 2. Rate: 2 g/hr / 0.04 g/mL = 50 mL/hr. Alternatively: (2 g / 40 g) x 1,000 mL = 50 mL. Exam Strategy: Magnesium is used for preeclampsia and electrolyte replacement. Ensure the units (grams) match between the order and the bag. If the order was in mg, you would need to convert first.
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1,030 NCLEX-RN question-and-answer cards across 21 topics, written for this exam. Refund policy.
The full NCLEX-RN deck contains 1030 flashcards, and 10 of them focus on math. This page shows 5 free samples.
Our NCLEX-RN deck dedicates 10 of 1030 cards (1%) to math — always cross-check the official NCSBN exam outline for the current blueprint weighting.
Yes — the samples on this page are free, and the NCLEX-RN preview page has 30 more free cards. Full access to all 1030 cards is a one-time $7.
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Obstetrics
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Pathology
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Pharmacology
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Procedures
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