226. A straight pipe 1 yard in length was marked off in fourths and also in thirds. If the pipe was then cut into separate pieces at each of these markings, which of the following gives all the different lengths of the pieces, in fractions of a yard?
答案是1/12, 1/6 and 1/4.
题就没看懂……pipe是取带子的意思么? in fourths and in thirds又是什么意思啊……求解