HESI A2 Math Practice

Correct Answer: A

Rationale: To change 0.015 to a fraction, we first identify that the number is in the thousandths place. Therefore, we write it as 15/1000. Then, we simplify by dividing both numerator and denominator by 5 to get the simplest form, which is 3/200. Choice A (3/200) is correct because it is the simplified fraction equivalent to 0.015. Choices B, C, and D are incorrect as they do not represent the correct conversion of the decimal 0.015 to a fraction.

Correct Answer: D

Rationale: The correct answer is D (50%). To determine the probability of getting an even number when rolling a dice, we first need to identify the total possible outcomes, which is 6 (numbers 1 to 6 on a dice). Out of these 6 outcomes, 3 are even numbers (2, 4, 6). Therefore, the probability of getting an even number is calculated as the number of favorable outcomes (even numbers) divided by the total possible outcomes, which is 3/6 = 1/2 = 50%. Choice A (16%) is incorrect because it represents the probability of rolling a specific number (1 out of 6) rather than the probability of rolling an even number. Choice B (33%) and Choice C (66%) are also incorrect as they do not accurately represent the probability of rolling an even number based on the total number of outcomes.

Correct Answer: A

Rationale: To convert kilograms to grams, we need to multiply by 1000 because there are 1000 grams in a kilogram. Therefore, 7 kilograms x 1000 = 7000 grams. Choice A is correct. Choices B, C, and D are incorrect because they do not correctly convert kilograms to grams. B is too small, C is one decimal place off, and D is too large.

Correct Answer: B

Rationale: The correct answer is B: 1/6. There is only one side on the die that shows a 4 out of six possible outcomes. Thus, the probability of rolling a 4 is 1 out of 6, which simplifies to 1/6. A: 1/2 - Incorrect. The die has 6 sides, not 2. C: 1/3 - Incorrect. There is only one side with a 4, not three. D: 1/2 - Incorrect. Again, the die has 6 sides, not 2.

Correct Answer: A

Rationale: To convert quarts to ounces, we know that 1 quart equals 32 ounces. To find the number of ounces in 3 5/8 quarts, we multiply 3 by 32 (96 oz) and add 5/8 of 32 (16 oz). Therefore, 3 5/8 quarts equals 96 + 16 = 112 ounces. The correct answer is 184 oz, which is obtained by multiplying 3 5/8 quarts by 32 (quarts to ounces conversion factor). Other choices are incorrect because they do not correctly apply the conversion factor from quarts to ounces or use incorrect calculations.