Each card shows two numbers from the multiplication table. The goal is to find a common factor for both numbers (a number that can be divided evenly into both numbers) and then to state the associated multiplication facts. Additional games are possible--including constructing factor "wheels" by placing four cards together to create a wheel of numbers that share a common factor. 96 double-sided cards. Multiple modes of play. Has self-check feature. Grades 3 & 4.