HESI A2
HESI A2 Math Practice
1. What is the probability of rolling a 5 on a six-sided die?
- A. 1/6
- B. 1/4
- C. 1/2
- D. 1/3
Correct answer: A
Rationale: The probability of rolling a specific number on a fair six-sided die is calculated by dividing the number of favorable outcomes (1 in this case, as there is one '5' on the die) by the total number of possible outcomes (6 for a six-sided die), resulting in a probability of 1/6. Therefore, the correct answer is A. Choices B, C, and D are incorrect because they do not accurately represent the probability of rolling a 5 on a six-sided die. Option B (1/4) is incorrect because it represents the probability of rolling a specific number on a four-sided die. Option C (1/2) and Option D (1/3) are incorrect as they do not match the probability calculation for rolling a 5 on a six-sided die.
2. Which bone does not articulate with any other bone?
- A. Femur
- B. Hyoid
- C. Radius
- D. Tibia
Correct answer: B
Rationale: The correct answer is the Hyoid bone. The hyoid bone is distinctive as it does not directly articulate with any other bone in the body. Instead, it is held in place by muscles and ligaments, playing a crucial role in supporting the tongue and providing attachment points for various muscles involved in swallowing and speech. The other choices, Femur, Radius, and Tibia, all articulate with other bones in the body. The femur articulates with the hip bone, the radius articulates with the ulna and other bones in the wrist, and the tibia articulates with the femur and fibula.
3. Which of the following epithelial types is correctly matched with its major function?
- A. Simple squamous epithelium – diffusion
- B. Stratified squamous epithelium – protection
- C. Stratified squamous epithelium – diffusion
- D. Simple columnar epithelium – secretion or absorption
Correct answer: D
Rationale: The correct answer is D. Simple columnar epithelium is indeed primarily responsible for secretion and absorption due to its tall shape and presence of microvilli, which increase surface area for these functions. Simple squamous epithelium is mainly involved in diffusion, allowing for the exchange of gases or nutrients. Stratified squamous epithelium functions more for protection against mechanical stress and pathogens, as it forms a tough, protective barrier due to its many layers.
4. What word is best to substitute for the underlined words in the following sentence? The nursing staff appreciate occasional thank-you cards.
- A. They
- B. It
- C. Them
- D. Us
Correct answer: C
Rationale: In the sentence, 'The nursing staff appreciate occasional thank-you cards,' the pronoun 'them' is the best word to substitute for 'nursing staff.' The word 'them' is a pronoun that refers to a group of people or things, which matches the plural form of 'nursing staff.' Therefore, 'them' is the correct choice in this context. Choice A, 'They,' could also refer to the nursing staff, but 'them' is more precise in this case. Choice B, 'It,' is singular and does not match the plural 'nursing staff.' Choice D, 'Us,' refers to the speaker and others, which is not appropriate in this context.
5. Convert 0.007 kilograms to grams.
- A. 7 grams
- B. 70 grams
- C. 0.07 grams
- D. 0.70 grams
Correct answer: A
Rationale: To convert kilograms to grams, you need to multiply by 1000 since there are 1000 grams in a kilogram. Therefore, 0.007 kilograms is equal to 0.007 x 1000 = 7 grams. Choice A is correct. Choice B is incorrect as it incorrectly multiplies by 10 instead of 1000. Choice C is incorrect as it incorrectly moves the decimal point one place to the right. Choice D is incorrect as it incorrectly moves the decimal point two places to the right.
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