Question

Which of the following is true:
(A) Integers from 0 to infinity are called whole numbers.
(B) An integer always has to be positive.
(C) 91 is a prime number.
(D) All natural numbers, whole numbers and integers are rational numbers.
Choose the correct answer from the options given below:

• A. (A) and (D) only.
• B. (A), (B) and (D) only.
• C. (A), (B), (C) and (D).
• D. (B), (C) and (D) only.

Hint:

Check each statement against the definitions of whole numbers, integers and prime numbers.

Answer 1

The Correct Option is A

Step 1: Whole numbers are 0, 1, 2, 3 and so on, so (A) is true.
Step 2: Integers include negative numbers too, so (B) is false.
Step 3: \(91 = 7 \times 13\), so it is not prime, making (C) false.
Step 4: Every natural number, whole number and integer can be written as a fraction over 1, so all are rational numbers, making (D) true.
Step 5: Only (A) and (D) are true.