HESI A2 Practice Test Math

Correct Answer: C

Rationale: The correct answer is C (150cm). To calculate the perimeter of the stop sign, you add up the length of all five sides, which is 25cm each. So, 25cm x 5 = 125cm. The rationale behind this is that the perimeter of any polygon is the sum of all its sides. Therefore, the correct perimeter of the stop sign is 125cm. The other choices are incorrect because they do not result from the correct calculation based on the dimensions given. Option A (100cm) is too small, Option B (125cm) is the result of calculating one side only, and Option D (175cm) is too large.

Correct Answer: A

Rationale: To solve for x in the equation X/4 = 9/x, we can cross multiply to get X * x = 4 * 9. Simplifying further, we get x^2 = 36, so x = √36 = 6. Choice A (x = 6) is correct. Choices B, C, and D are incorrect because they do not satisfy the equation when substituted back in. B: 6/4 ≠ 9/6, C: 6/4 ≠ 9/9, D: 6/4 ≠ 9/2.

Correct Answer: A

Rationale: To evaluate xm - 2m when x = -2 and m = -3: Substitute x and m into the expression: (-2)(-3) - 2(-3) Simplify: 6 + 6 = 12 Therefore, the correct answer is A (12). The other choices are incorrect as they do not match the correct calculation.

Correct Answer: C

Rationale: The correct answer is C (150cm). To calculate the perimeter of the stop sign, you add up the length of all five sides, which is 25cm each. So, 25cm x 5 = 125cm. The rationale behind this is that the perimeter of any polygon is the sum of all its sides. Therefore, the correct perimeter of the stop sign is 125cm. The other choices are incorrect because they do not result from the correct calculation based on the dimensions given. Option A (100cm) is too small, Option B (125cm) is the result of calculating one side only, and Option D (175cm) is too large.

Correct Answer: A

Rationale: The correct answer is A: 2 liters. 1 quart is equivalent to 0.946 liters. Therefore, 2 quarts equal 1.892 liters, which can be rounded to 2 liters for practical purposes. This conversion is necessary as the measuring device is marked in liters, and the directions in quarts need to be converted accurately. The other choices are incorrect because B (1 liter) is less than the required amount, C (3 liters) is too much, and D (5 liters) is excessive based on the conversion from quarts to liters.