单选题 A rectangle with dimensions 24 inches by 42 inches is to be divided into squares of equal size. Which of the following could be a length of a side of the squares?

【正确答案】 B
【答案解析】[解析] 要使分割成的正方形的大小都相同，则分割成的正方形的边长一定为长方形的长和宽的公约数，42与24的公约数有1，2，3，6。