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What is expressed as a percent?
- A. 50%
- B. 20%
- C. 10%
- D. 5%
Correct Answer: B
Rationale: Change a fraction to a percent by dividing the numerator by the denominator and multiplying by 100.
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What is 2.5 ? 2?
- A. 1.25
- B. 5
- C. 50
- D. 22.5
Correct Answer: B
Rationale: When multiplying, decimal points do not have to be aligned. The decimal point in the answer is determined by the number of decimal points found to the right of the decimal point in the numbers multiplied.
Which of the following fractions is the smallest?
- A. 1/8
- B. 1/4
- C. 1/2
- D. 3/4
Correct Answer: A
Rationale: The larger the denominator, the smaller the fraction.
A 35-lb child is to receive an IM medication. The average adult dose is 75 mg. Using the Clark rule what dosage should the nurse administer?
- A. 30.5 mg
- B. 25.5 mg
- C. 20.5 mg
- D. 17.5 mg
Correct Answer: D
Rationale: [Weight of child in pounds ÷ 150] ? average adult dose = child's dose.
Lanoxin 0.125 mg is to be given. The nurse converts the dose to how many grams?
- A. 1.250 g
- B. 1250 g
- C. 0.000125 g
- D. 0.00125 g
Correct Answer: C
Rationale: Small, arrow to big, move the decimal point three places in the direction the arrow points; move decimal three places to the left.
What is 0.9% expressed as a decimal?
- A. 9
- B. 0.9
- C. 0.09
- D. 0.009
Correct Answer: D
Rationale: Remove the % and move the decimal point two places to the left.