Jamboree Question of the Day - Day 28, Jan 21st 2011

Is x2 – y2 a positive number?

a) x – y is a positive number.
b) x + y is a positive number

A. Statement (a) ALONE is sufficient, but statement (b) alone is not sufficient.
B. Statement (b) ALONE is sufficient, but statement (a) alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D. EACH statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient.

Solution (Posted on 22nd): C

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