HESI A2 Math Practice Exam

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: 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: C

Rationale: To find the number of customers served, we add the incidents that delayed the server's service time: 43 customers + 2 broken glasses + 5 slips = 50 incidents Given that the server breaks 10 glasses the next day, we double the incidents: 50 incidents x 2 = 100 incidents Each incident corresponds to serving a customer, so the server served 100 customers in total. Thus, the correct answer is C (86 customers). Choices A, B, and D are incorrect because they do not account for the additional incidents affecting the service time.

Correct Answer: A

Rationale: To find the number of black marbles, we need to subtract the number of white marbles from the total. 34% of 6,657 is white marbles, which is approximately 2,261. So, the number of black marbles is 6,657 - 2,261 = 4,396. The closest option is A: 4,394, which is the correct answer. Choices B, C, and D are incorrect because they do not accurately represent the calculated number of black marbles.

Correct Answer: C

Rationale: To convert 2 teaspoons to milliliters, we need to know that 1 teaspoon is approximately 4.93 milliliters. Therefore, 2 teaspoons would be 2 * 4.93 = 9.86 milliliters. The correct answer is C (9.86 milliliters). Choice A (4.3 milliliters) is incorrect because it is too low based on the conversion factor. Choice B (9 milliliters) is close but not accurate, as the exact conversion gives 9.86 milliliters. Choice D (4 milliliters) is also incorrect as it is lower than the actual conversion.