... lessons are designed to review the basic mathematical concepts that you will encounter on the GMAT Quantitative section and are divided into three major sections: arithmetic, algebra, and geometry.The ... the problem.Special Types of Defined OperationsSome unfamiliar operations may appear on the GMAT exam. These questions may involve operations thatuse symbols like #, $, &, or @. Usually, ... without a remainder. For example, 5 isa factor of 30 because without a remainder left over.On the GMAT exam, a factor question could look like this:If x is a factor of y, which of the following...