HESI A2 Math Practice Test 2023

Correct Answer: B

Rationale: To find the sum of 1/3, 1/4, and 1/6, we need to first find a common denominator, which is 12 in this case. Then, we convert each fraction to have the same denominator: 1/3 = 4/12, 1/4 = 3/12, and 1/6 = 2/12. Adding these fractions gives us 4/12 + 3/12 + 2/12 = 9/12, which simplifies to 3/4 or 0.75. Therefore, the correct answer is B: 1/2. Explanation for other choices: A: 5/12 - Incorrect. This sum is not equal to the sum of 1/3, 1/4, and 1/6. C: 1/3 - Incorrect. This is the value of just one of the given fractions, not the sum of all three

Correct Answer: C

Rationale: The correct answer is C: 10. The metric system is based on multiples of 10, making conversions between units easy and logical. This factor allows for a systematic and uniform system of measurement, which is essential for scientific accuracy and global standardization. Choices A, B, and D are incorrect because the metric system is not based on the length of Napoleon's forearm, the number 2, or the atomic weight of helium. These options do not align with the foundational principles of the metric system, which is built on the decimal system for simplicity and consistency.

Correct Answer: C

Rationale: To subtract 20.7 from 13.4, we need to borrow since we cannot subtract a larger number from a smaller one. So, borrowing from the tens place, we get 13.4 as 12.14. Then, subtracting 12.14 from 20.7 gives us 8.56. Rounding off to one decimal place, we get 8.6, which is closest to choice C: 7.3. Hence, the correct answer is C. Choice A, 7.1, is incorrect as it is not close to the calculated result. Choices B and D are also incorrect as they are not close to the rounded off result.

Correct Answer: B

Rationale: To subtract 14.5 - 7.25, align the decimals and perform subtraction. Starting from the right, subtract 5 from 0 (borrow 1 from 4), giving 5. Then, subtract 2 from 4, giving 2. The correct answer is 7.25. Other choices are incorrect because they do not match the result obtained from the subtraction process. Choice A and C are too small, while choice D is too large.

Correct Answer: A

Rationale: To convert milliliters to liters, we need to divide by 1000 since there are 1000 milliliters in a liter. So, 300 milliliters ÷ 1000 = 0.3 liters. Therefore, the correct answer is A: 0.3 liters. Explanation for other choices: B: 3 liters - Incorrect, as 300 milliliters is not equal to 3 liters. C: 0.03 liters - Incorrect, the decimal point placement is off. D: 3.3 liters - Incorrect, as it is not the correct conversion from milliliters to liters.