HESI A2 Math Practice Exam

Correct Answer: C

Rationale: To calculate the flow rate in drops per minute, we first convert the infusion time to minutes (4 hours = 240 minutes). Then, we multiply the total volume (500 ml) by the number of drops per milliliter (20) to get the total drops. Dividing total drops by total time gives the flow rate. Therefore, 500 ml x 20 drops/ml = 10,000 drops. Flow rate = 10,000 drops / 240 minutes = 41.67 drops/min. Rounding up, the correct answer is C: 50 drops/min. Choice A is incorrect as it is half the correct value. Choices B and D are incorrect as they are double and quadruple the correct value, respectively.

Correct Answer: D

Rationale: To find the total number of patients seen in 8 hours, first calculate the number of patients seen in 1 hour (25/4 = 6.25). Then, multiply by 8 to get the total (6.25 * 8 = 50). Therefore, the correct answer is D. Choices A, B, and C are incorrect because they do not follow the correct calculation process. A, B, and C do not consider the rate of patients seen per hour or the total hours the clinic is open.

Correct Answer: A

Rationale: To find the number that 44 is 25% of, we divide 44 by 0.25 (which is 25% expressed as a decimal). 44 / 0.25 = 176. Therefore, 44 is equal to 25% of 176. Option A (176) is the correct answer. Option B (150), C (180), and D (120) are incorrect as they do not result in 44 when multiplied by 0.25.

Correct Answer: A

Rationale: To convert meters to centimeters, we use the conversion factor: 1 meter = 100 centimeters. Therefore, to convert 6 meters to centimeters, we multiply 6 by 100, which equals 600 cm. So, the correct answer is A: 600 cm. Choice B (60 cm) is incorrect as it incorrectly multiplies by 10 instead of 100. Choice C (1000 cm) is incorrect as it multiplies by 1000 instead of 100. Choice D (500 cm) is incorrect as it is a random number not derived from the correct conversion factor.

Correct Answer: A

Rationale: To add 9.43 and 11.3, align the decimal points and add the numbers as follows: 9.43 +11.30 ------- 20.73 Therefore, the correct answer is A: 20.73. The other choices are incorrect as they do not match the sum obtained through the addition process. B: 21.3 does not account for the decimal place in 9.43. C: 22 is the sum of the whole numbers without considering the decimal values. D: 19.5 is the sum if the decimal values are not accounted for.