Question

Which of the following is not true:
(A) Zero is a prime number.
(B) One is an integer.
(C) 31 is a whole number but not a prime number.
(D) -31 is an integer but not a whole number.
Choose the correct answer from the options given below:

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

Hint:

Zero is not prime, and 31 is itself a prime number.

Answer 1

The Correct Option is A

Step 1: Zero is not a prime number by definition, so (A) is false, meaning it is not true.
Step 2: One is indeed an integer, so (B) is a true statement.
Step 3: 31 is a whole number, but it is prime, so (C) is false, meaning it is not true.
Step 4: -31 is an integer, and whole numbers start from 0 upward, so -31 is indeed not a whole number, making (D) a true statement.
Step 5: The statements that are not true are (A) and (C) only.