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?

1) 1/6 and 1/4 only
2) 1-4 and 1/3 only
3) 1/6,1/4 and 1/3
4) 1/12,1/6 and 1/4
5) 1/12,1/6 and 1/3