HESI A2 Practice Test Math

Correct Answer: C

Rationale: The correct answer is C: 0.09%. To convert 0.0009 to a percentage, you move the decimal point two places to the right, resulting in 0.09%. Option A (0.009%) is incorrect as it would be the equivalent of 0.00009. Option B (0.9%) is incorrect as it represents 0.009. Option D (9%) is incorrect as it is equivalent to 0.09, which is 100 times greater than the given value.

Correct Answer: D

Rationale: To find which percentage equals 1.25, we convert 1.25 to a percentage by multiplying it by 100. 1.25 * 100 = 125%. Therefore, the correct choice is D. Choice A (1250%) is incorrect as it represents 12.5, not 1.25. Choices B (25%) and C (50%) are also incorrect as they are significantly lower than 1.25.

Correct Answer: A

Rationale: To convert ounces to milliliters, we use the conversion factor: 1 oz = 29.5735 mL. Since the bottle contains 1/2 oz, we multiply 1/2 by 29.5735 to get 14.78675 mL. Rounding up, the closest option is 15 mL (choice A). Choices B, C, and D are incorrect as they do not match the calculated conversion from ounces to milliliters.

Correct Answer: A

Rationale: To add 5 2/9 and 1 2/9, first add the whole numbers: 5 + 1 = 6. Then add the fractions: 2/9 + 2/9 = 4/9. Combine the whole number and the fraction to get 6 4/9, which is the correct answer (A). Other choices are incorrect because they either do not consider adding the fractions (D), or incorrectly add only the whole numbers (C), or miscalculate the fractions (B).

Correct Answer: B

Rationale: To find the number of boys, we first calculate 44% of 25 (total students). This gives us 0.44 * 25 = 11 boys. Therefore, the correct answer is B. Choice A (10 boys) is incorrect as it is based on rounding down from 44%, and choices C (9 boys) and D (13 boys) are incorrect as they do not match the calculated 11 boys.