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
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