# GMAT Question of the Day – Data Sufficiency – Number Properties

If a, b, and c are not equal to zero, is abc > 0?

(1) ab + ac > 1

(2) ac + cb > 1

[spoiler]**E.**[/spoiler]

Here’s a problem solving question also dealing with testing signs: How many of the integers that satisfy the inequality (x+2)(x+3)/(x−2) ≥ 0 are less than 5?

And another couple GMAT Question of the day examples featuring number properties/positive negative/signs

GMAT Question of the Day Number Properties/Signs

GMAT Question of the Day Absolute Value/Number Properties/Signs