HESI A2 Math Practice Exam

Correct Answer: A

Rationale: To convert pints to ounces, we know that 1 pint equals 16 ounces. Therefore, 3/4 of a pint is equal to 3/4 * 16 = 12 ounces. So, the correct answer is A: 12 ounces. Option B (16 ounces) is the total amount in 1 pint, not 3/4 pint. Option C (14 ounces) and D (10 ounces) are incorrect conversions.

Correct Answer: A

Rationale: The correct answer is A because to determine the highest average systolic pressure, you need to find the largest number in the "systolic pressure" column. This is because the average is calculated based on all the values in the column, and the highest number will have the most significant impact on the average. By finding the largest number, you ensure that the highest average systolic pressure is accurately identified. Option B is incorrect because comparing the means of each age group does not specifically pinpoint the highest average systolic pressure. Option C is incorrect as it calculates the overall average rather than focusing on the highest value. Option D is incorrect as subtracting the lowest from the highest does not give the highest average systolic pressure.

Correct Answer: D

Rationale: The correct answer is D: 16. A perfect square is a number that can be expressed as the product of an integer multiplied by itself. In this case, 16 is a perfect square because it can be written as 4 x 4. Choices A, B, and C are not perfect squares because they cannot be expressed as the product of an integer multiplied by itself. Thus, 16 is the only number among the choices that fits the definition of a perfect square.

Correct Answer: B

Rationale: The correct answer is B: MCMVI. Here's the rationale: 1. M represents 1000, CM represents 900, and VI represents 6. 2. Combining these symbols, MCMVI represents 1000 (M) + 900 (CM) + 6 (VI) = 1906. 3. Option A (MCMIV) is incorrect as IV represents 4, not 6. 4. Option C (MDCCCCVI) is incorrect as it uses the subtractive notation excessively (900 + 100 + 100 + 100 + 100 + 5 + 1). 5. Option D (MCMVII) is incorrect as VII represents 7, not 6.

Correct Answer: B

Rationale: To make yellow balls 65% of total, they need to be 65 out of every 100 balls. Let the number of yellow balls be Y. Total balls = Y + X. So, Y/(Y+X) = 65/100. Solving, Y = 13X. To make yellow balls 65%, the ratio of yellow to total should be 13:20. So, 13/(13+20) = 13/33 = 39.4%, which means 60.6% are non-yellow balls. To increase yellow balls to 65%, we need to make non-yellow balls 35%. Therefore, 35% of total balls should be non-yellow. This means 35% of total balls should be non-yellow. Hence, the correct answer is 50 (option B). Other choices are incorrect as they do not align with the logic of maintaining the 65% yellow ball ratio.