Math HESI A2 Practice Test

Correct Answer: A

Rationale: To produce 6 eggs in 24 hours, 2 chickens are needed. Therefore, to produce 24 eggs, we need (2 chickens / 6 eggs) * 24 eggs = 8 chickens. So, the correct answer is A. Choice B is incorrect because it does not account for the correct ratio of chickens to eggs. Choice C is incorrect as it overestimates the number of chickens needed. Choice D is incorrect as it does not consider the ratio of chickens to eggs accurately.

Correct Answer: A

Rationale: The correct answer is A: 50%. A six-sided die has 3 even numbers (2, 4, 6) out of a total of 6 possible outcomes (1, 2, 3, 4, 5, 6). To calculate the probability of rolling an even number, we divide the number of favorable outcomes (3) by the total number of outcomes (6), resulting in 3/6 = 0.5 or 50%. Explanation of other choices: B: 16.70% - Incorrect. This percentage does not represent the probability of rolling an even number on a six-sided die. C: 25% - Incorrect. This represents the probability of rolling any number divisible by 5 on a six-sided die, not just even numbers. D: 33.30% - Incorrect. This percentage does not reflect the probability of rolling an even number on a six-sided die.

Correct Answer: C

Rationale: To calculate the total milligrams administered in 3 hours, we first find the total drops delivered in 3 hours: 40 drops/min * 180 min = 7,200 drops. Then, we convert drops to milligrams: 7,200 drops * 1mg/drop = 7,200mg. Therefore, the correct answer is C (7,200mg). Choice A (360mg) is incorrect because it doesn't account for the duration of 3 hours. Choice B (720mg) is incorrect as it doesn't consider the total drops delivered. Choice D (14,400mg) is incorrect because it overestimates the amount by assuming each drop is administered separately, which is not the case in a continuous IV drip.

Correct Answer: B

Rationale: To solve for x in the equation 4x + 2 = 18, we first isolate x by subtracting 2 from both sides, giving us 4x = 16. Then, we divide both sides by 4 to find x = 4, which is choice B. The correct answer is x = 4 because substituting x = 4 back into the original equation gives 4(4) + 2 = 18, which simplifies to 16 + 2 = 18, confirming that x = 4 is the solution. Choices A, C, and D are incorrect because they do not satisfy the original equation when substituted back in.

Correct Answer: D

Rationale: To convert kilograms to grams, we need to multiply by 1000 since there are 1000 grams in a kilogram. So, 8 kilograms x 1000 = 8000 grams. Therefore, the correct answer is D: 8000 grams. Choice A (80000 grams) is incorrect as it incorrectly multiplies by 100 instead of 1000. Choice B (800 grams) is incorrect as it is the result if we ignore the conversion factor. Choice C (80000 grams) is a duplication of choice A.