HESI A2
HESI A2 Math Practice Exam Questions
Question 1 of 5
A table shows the average blood pressure readings for different age groups. How do you determine the highest average systolic pressure?
Correct Answer: A
Rationale:
Rationale:
-
To determine the highest average systolic pressure, you need to identify the highest individual systolic pressure reading in the dataset.
- Option A instructs you to find the largest number in the "systolic pressure" column, which directly addresses the task of identifying the highest systolic pressure reading.
- Comparing means (Option
B) would not necessarily give you the highest individual systolic pressure reading, as averages can be influenced by the distribution of values within each age group.
- Adding all systolic pressure values and dividing by the total number of patients (Option
C) would give you the overall average systolic pressure, not the highest individual reading.
- Subtracting the lowest systolic pressure from the highest (Option
D) would give you the range of systolic pressures, not specifically the highest individual reading.
Therefore, the correct approach to determine the highest average systolic pressure
Question 2 of 5
Evaluate the following expression: -x + y + xy, when x = 4 and y = 2.
Correct Answer: B
Rationale:
To evaluate the expression, substitute x = 4 and y = 2 into the expression: -4 + 2 + 4*2. Calculate each term: -4 + 2 = -2, then 4*2 = 8. Adding these results gives -2 + 8 = 6.
Therefore, the correct answer is 6.
Choice A (2) is incorrect as it does not consider all terms in the expression.
Choice C (12) is incorrect as it miscalculates the result by failing to account for the negative sign.
Choice D (8) is incorrect as it doesn't consider the negative value of the first term in the expression.
Question 3 of 5
The physician ordered 16 mg of Ibuprofen per kg of body weight; on hand are 80 mg tablets. The child weighs 15 kg. How many tablets will you give?
Correct Answer: B
Rationale:
To calculate the total dose required for the child, multiply the child's weight (15 kg) by the prescribed dose per kg (16 mg/kg): 15 kg * 16 mg/kg = 240 mg. Next, determine how many tablets are needed to reach this total dose: 240 mg / 80 mg per tablet = 3 tablets. However, since you cannot give a fraction of a tablet, the correct answer is 2 tablets.
Choice A is incorrect because it miscalculates the number of tablets needed.
Choice C is incorrect because only 1 tablet is not sufficient to reach the required dose.
Choice D is incorrect because you cannot give a partial tablet, so it has to be rounded down to the nearest whole tablet.
Question 4 of 5
Jill saved $140 out of the $400 she earned in one month. What percent of her earnings did she save?
Correct Answer: B
Rationale:
To calculate the percentage of her earnings that Jill saved, divide the amount saved ($140) by the total earnings ($400) and then multiply by 100 to find the percentage.
Therefore, (140/400) * 100 = 35%. Jill saved 35% of her earnings.
Choice A (30%) is incorrect because it underestimates the percentage saved.
Choice C (40%) is incorrect as it overestimates the percentage saved.
Choice D (25%) is incorrect for the same reason. The correct calculation is 140/400 = 0.35 * 100 = 35%.
Question 5 of 5
How many millimeters are in 4 meters?
Correct Answer: B
Rationale:
To convert meters to millimeters, you need to know that there are 1000 millimeters in 1 meter.
Therefore, to find out how many millimeters are in 4 meters, you multiply 4 (meters) by 1000 (millimeters per meter), which equals 4000 millimeters.
Choice A, 400 mm, is incorrect because it represents 4 decimeters, not 4 meters.
Choice C, 40 mm, is incorrect because it represents 4 centimeters, not 4 meters.
Choice D, 100 mm, is incorrect because it represents 1 meter, not 4 meters.