a necklace is made by stringing N indivudual beads together in the repeating pattern red, bead, green bead, white bead, blue bead, and yellow bead. if the neclace design begins with a read bead and ends wiht a white bead, then N could equal.
答案为68,请指敎!谢谢!作者: WTO 时间: 2005-3-29 13:01
N=5*n+3, when n=13, N=68作者: sammen 时间: 2005-3-29 20:01