WGU C784 Applied Healthcare Statistics OA Exam | Latest
Update 2026/2027 | 200 Questions and Verified Answers |
Complete Q&A Guide | A+ Graded
MODULE 1: NUMBER TYPES, BASIC OPERATIONS, AND SET THEORY
1. Which of the following is a rational number?
A) π
B) √2
C) 3/4
D) √5
Answer: C) 3/4
Explanation: A rational number is any number that can be written as a ratio of integers (a fraction). π
and √2 are irrational numbers because they cannot be expressed as a fraction of two integers.
2. What type of number is 0?
A) Natural number only
B) Whole number only
C) Integer and whole number
D) Irrational number
Answer: C) Integer and whole number
,Explanation: Zero is a whole number (0 or greater, represented without a fractional or decimal
component) and an integer, but it is not a natural number (natural numbers start at 1).
3. Which of the following is a composite number?
A) 7
B) 11
C) 15
D) 13
Answer: C) 15
Explanation: A composite number has more factors than just 1 and itself. 15 has factors 1, 3, 5, and 15.
7, 11, and 13 are prime numbers.
4. What is the product of 8 and 7?
A) 15
B) 48
C) 56
D) 64
Answer: C) 56
Explanation: A product is the result of multiplying values. 8 × 7 = 56.
,5. Which property states that 0 can be added to any number without changing its value?
A) Associative property
B) Commutative property
C) Identity property
D) Distributive property
Answer: C) Identity property
Explanation: The identity property states that 0 can be added to any number without changing its value,
and 1 can be multiplied by any number without changing its value.
6. Which operation is associative?
A) Subtraction
B) Division
C) Addition
D) Both A and B
Answer: C) Addition
Explanation: Addition and multiplication are associative, meaning computations in a multistep
expression may be done in any order. Subtraction and division are not associative.
, 7. What is the square root of 64?
A) 6
B) 7
C) 8
D) 9
Answer: C) 8
Explanation: A perfect square is the product of any integer with itself. 8 × 8 = 64, so √64 = 8.
8. Given the set of numbers: 3.3, 2.3, 16, 25. What are the square roots of the whole number?
A) ±2.3
B) ±3.3
C) ±4
D) ±5
Answer: D) ±5
Explanation: The whole number in the set is 25. The square roots of 25 are ±5 because 5 × 5 = 25 and (5)
× (5) = 25.
Update 2026/2027 | 200 Questions and Verified Answers |
Complete Q&A Guide | A+ Graded
MODULE 1: NUMBER TYPES, BASIC OPERATIONS, AND SET THEORY
1. Which of the following is a rational number?
A) π
B) √2
C) 3/4
D) √5
Answer: C) 3/4
Explanation: A rational number is any number that can be written as a ratio of integers (a fraction). π
and √2 are irrational numbers because they cannot be expressed as a fraction of two integers.
2. What type of number is 0?
A) Natural number only
B) Whole number only
C) Integer and whole number
D) Irrational number
Answer: C) Integer and whole number
,Explanation: Zero is a whole number (0 or greater, represented without a fractional or decimal
component) and an integer, but it is not a natural number (natural numbers start at 1).
3. Which of the following is a composite number?
A) 7
B) 11
C) 15
D) 13
Answer: C) 15
Explanation: A composite number has more factors than just 1 and itself. 15 has factors 1, 3, 5, and 15.
7, 11, and 13 are prime numbers.
4. What is the product of 8 and 7?
A) 15
B) 48
C) 56
D) 64
Answer: C) 56
Explanation: A product is the result of multiplying values. 8 × 7 = 56.
,5. Which property states that 0 can be added to any number without changing its value?
A) Associative property
B) Commutative property
C) Identity property
D) Distributive property
Answer: C) Identity property
Explanation: The identity property states that 0 can be added to any number without changing its value,
and 1 can be multiplied by any number without changing its value.
6. Which operation is associative?
A) Subtraction
B) Division
C) Addition
D) Both A and B
Answer: C) Addition
Explanation: Addition and multiplication are associative, meaning computations in a multistep
expression may be done in any order. Subtraction and division are not associative.
, 7. What is the square root of 64?
A) 6
B) 7
C) 8
D) 9
Answer: C) 8
Explanation: A perfect square is the product of any integer with itself. 8 × 8 = 64, so √64 = 8.
8. Given the set of numbers: 3.3, 2.3, 16, 25. What are the square roots of the whole number?
A) ±2.3
B) ±3.3
C) ±4
D) ±5
Answer: D) ±5
Explanation: The whole number in the set is 25. The square roots of 25 are ±5 because 5 × 5 = 25 and (5)
× (5) = 25.
