Question

What is the value of the number n? Statement I: n is the only even prime number. Statement II: n is the positive square root of 4.

• A. Statement I alone is sufficient, but statement II alone is not sufficient.
• B. Statement II alone is sufficient, but statement I alone is not sufficient.
• C. Both statements together are sufficient, but neither statement alone is sufficient.
• D. Each statement alone is sufficient.

Hint:

Check whether each statement by itself pins n to a single value.

Answer 1

The Correct Option is D

Both clues point to the same unique value: 'only even prime' forces 2, and $+\sqrt{4}=2$ also forces 2. Since either one alone determines n, each statement alone is sufficient.