HESI A2 Math Practice Test 2024

Correct Answer: A

Rationale: To convert kilograms to grams, you need to multiply by 1000 as there are 1000 grams in 1 kilogram. Therefore, to find the number of grams in 4 kilograms, you would multiply 4 by 1000, which equals 4000 grams. So, the correct answer is A: 4000. Choice B (40) would be the result if you mistakenly multiplied by 10 instead of 1000. Choice C (500) is the result if you mistakenly added or subtracted a zero. Choice D (0) is clearly incorrect as there are grams in 4 kilograms.

Correct Answer: A

Rationale: To determine the patient with the highest systolic pressure in the table, you need to find the largest number in the 'systolic pressure' column. This is because the highest systolic pressure reading directly corresponds to the individual with the highest blood pressure value among all age groups. Comparing means (Choice B) would not identify the specific individual with the highest pressure, as it calculates an average. Adding all values and dividing by the total number (Choice C) would give the average pressure, not the highest. Subtracting the lowest from the highest (Choice D) would only give the range, not the specific highest value.

Correct Answer: D

Rationale: To find the percentage equivalent of a decimal number, you multiply the decimal by 100. So, for 0.45, you get 0.45 x 100 = 45%. Therefore, the correct answer is D. Choice A (4.5%) is 10 times greater than 0.45, Choice B (0.045%) is 100 times smaller, and Choice C (0.45%) is the same as the decimal, not the percentage equivalent.

Correct Answer: C

Rationale: To find the volume of the frustum of a cone, we use the formula V = 1/3 * πh * (R^2 + r^2 + Rr), where h is the height, R is the radius of the larger base, and r is the radius of the smaller base. Plugging in the values (h=15cm, R=10cm, r=5cm), we get V = 1/3 * π * 15 * (100 + 25 + 50) = 1875 cu cm. This is why choice C is correct. Choice A is incorrect because it uses the incorrect formula for volume of a cone. Choices B and D are also incorrect as they do not consider the frustum shape and use the formula for a full cone.

Correct Answer: B

Rationale: To find the length of the room, we use the formula for the area of a rectangle: Area = Length x Width. Given that the area is 225 sq ft and the width is 15 ft, we can substitute these values into the formula: 225 = Length x 15. Solving for Length, we get Length = 225 / 15 = 15 feet. Therefore, the correct answer is B: 15 feet. Choice A (30 feet) is incorrect because it is twice the width and does not align with the given area. Choice C (25 feet) is incorrect because it does not satisfy the area requirement. Choice D (45 feet) is incorrect as it is not consistent with the given width and area.