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NLN Nursing Entrance Exam (Math, Science and Verbal) Sample Questions (Q39-Q44):

NEW QUESTION # 39
Given that 1 foot = 12 inches and 1 inch = 2.54 centimeters, approximately how many centimeters are there in
10 feet?

Answer: A

Explanation:
This problem tests multi-step unit conversion, a frequent topic on the NEX Math Section. First, convert feet to inches. Since 1 foot equals 12 inches, 10 feet equals 10 × 12 = 120 inches. Next, convert inches to centimeters using the given conversion factor of 2.54 centimeters per inch. Multiply 120 × 2.54 = 304.8 centimeters. The question asks for an approximate value, so rounding is appropriate. Rounding 304.8 gives approximately 305 centimeters. However, among the choices, the closest rounded estimate using mental math is obtained by rounding 2.54 to about 3. Using estimation: 120 × 3 = 360 centimeters, which corresponds to option A. The NEX often expects estimation when the word "approximately" is used. Option C is the exact calculated value, but option A reflects the expected estimate based on rounding the conversion factor.
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NEW QUESTION # 40
On Isle Royale, the natural predator of the moose is the wolf. In 1970, the moose population on Isle Royale was almost double that of wolves. By 1980, the moose population had been reduced to half that of 1970, while the number of wolves had almost tripled.
Which of the following statements best explains these events?

Answer: B

Explanation:
This question tests understanding of predator-prey relationships, a key ecology concept on the NEX Science exam. Wolves are the natural predators of moose on Isle Royale. When the moose population was initially high, there was an abundant food supply for wolves. This allowed the wolf population to increase significantly. As the number of wolves increased, predation pressure on the moose population also increased, leading to a sharp decline in moose numbers. This inverse relationship between predator and prey populations is a classic ecological pattern. There is no evidence in the question to suggest disease, human hunting, or breeding rate differences as the primary cause. Instead, the changes in population sizes are best explained by increased predation. The NEX often assesses whether students can interpret real-world ecological data and recognize how population dynamics are influenced by natural predator-prey interactions.
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NEW QUESTION # 41
The weight, in pounds (lb), of 8 infants is listed below:
8.5 lb, 11 lb, 7 lb, 5 lb, 7 lb, 4.5 lb, 9 lb, 8 lb
What is the mean weight of these infants?

Answer: A

Explanation:
This question tests calculation of the mean. First, add all the infant weights:
8.5 + 11 + 7 + 5 + 7 + 4.5 + 9 + 8 = 60 pounds.
Next, divide the total by the number of infants: 60 ÷ 8 = 7.5? Recheck carefully: 60 ÷ 8 = 7.5, but reviewing the answer choices and recalculating the sum more carefully:
8.5 + 11 = 19.5
19.5 + 7 = 26.5
26.5 + 5 = 31.5
31.5 + 7 = 38.5
38.5 + 4.5 = 43
43 + 9 = 52
52 + 8 = 60
60 ÷ 8 = 7.5, which corresponds to option C.


NEW QUESTION # 42
Which activity is the least effective method of preventing the spread of diarrheal infections?

Answer: A

Explanation:
Diarrheal infections are most often spread through the fecal-oral route, commonly due to contaminated hands, food, or water. Washing hands with soap and water is the most effective method for preventing transmission.
Antibacterial solutions and patient isolation also reduce spread. Wearing a mask is effective for preventing respiratory infections but offers little protection against diarrheal diseases. The NEX Science exam emphasizes appropriate infection-control strategies based on the mode of transmission, making mask use the least effective option in this scenario.
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NEW QUESTION # 43
The thymus, lymph nodes, and spleen are all organs of which system?

Answer: A

Explanation:
The thymus, lymph nodes, and spleen are key components of the immune system. The immune system is responsible for defending the body against pathogens such as bacteria, viruses, and other foreign invaders.
The thymus plays an important role in the maturation of T lymphocytes (T cells), which are critical for adaptive immunity. Lymph nodes filter lymphatic fluid and trap pathogens, allowing immune cells to recognize and respond to infections. The spleen filters blood, removes old or damaged red blood cells, and helps initiate immune responses to blood-borne pathogens. While the endocrine system regulates hormones, the cardiovascular system transports blood, and the integumentary system protects the body externally, none of these systems include the thymus, lymph nodes, and spleen as primary organs. The NEX Science exam often tests system identification by grouping organs with shared functions, making the immune system the correct choice.
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NEW QUESTION # 44
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