A car and a van are traveling at different constant speeds on a straight highway. If the car is now 4 miles ahead of the van, how much time, in hours, will it take for the car to be 10 miles ahead of the van? (1) The car is traveling 70 miles per hour and the truck is traveling 65 miles per hour. (2) One hour ago, the car was 1 mile behind the van.

Data Sufficiency questions are exclusive to the GMAT.

Each Data Sufficiency question poses a question, followed by two statements. Your task is to evaluate the statements to determine at what point there is or is not sufficient information to answer the question.

Unlike the Problem Solving questions, you do not actually have to answer the question posed. Instead, you select one of five fixed answer choices that offer different options about the sufficiency of the information provided in the two statements.