HESI A2 Practice Test Math

Correct Answer: A

Rationale: The correct answer is A (175 mg). To find out how much calcium is left, subtract the lost amount (325 mg) from the original amount (500 mg): 500 mg - 325 mg = 175 mg. This calculation shows that 175 mg of calcium are left in the expired vitamin. Choice B (135 mg) is incorrect because it does not account for the correct subtraction of the lost amount. Choice C (185 mg) and Choice D (200 mg) are also incorrect as they do not reflect the accurate calculation based on the given information.

Correct Answer: D

Rationale: To determine if a number is divisible by another, it must leave no remainder when divided. 7 is a prime number and can only be divided by 1 and itself (7). So, choices A and B are incorrect. Since 7 is a prime number, it is only divisible by numbers that are factors of 7 (1, 7) or itself. Therefore, choice C is also incorrect. The correct answer is D because 7 can be evenly divided by 2, 3, and 7 without any remainder, making it divisible by these numbers.

Correct Answer: B

Rationale: To calculate the number of tablets needed, we divide the patient's weight by 30 (150/30 = 5). Then, we multiply the result by 2 since they need 2 tablets per 30 pounds (5 x 2 = 10). Therefore, the correct answer is B (10 tablets). Choice A is incorrect as it does not account for the weight calculation. Choices C and D are incorrect as they do not consider the dosage requirement based on the patient's weight.

Correct Answer: A

Rationale: Failed to generate a rationale after 5 retries.

Correct Answer: C

Rationale: To convert milliliters to liters, you divide by 1000 because there are 1000 milliliters in a liter. So, 300 milliliters divided by 1000 equals 0.3 liters. A: 0.03 liters - Incorrect, the decimal point is misplaced. B: 3 liters - Incorrect, this is 1000 milliliters, not 300. D: 0.003 liters - Incorrect, the decimal point is misplaced.