Question

Alison made a chain using 220 beads colored,red green and black. She placed the beads in the following pattern, 5 red , 3 green, 2 black. What color is the 138th beads on the chain?

Answer 1

Green

Explanation:

All you have to do is retrace retrace Alison’s steps. Note that there are 10 beads in the pattern, the 10th bead black. 210, 200, 190, 180, 170, 160, 150, 140. The 140th bead is black, because it is a multiple of 10. The 139 bead is black as well, because the end of Alison’s pattern contained 2 black beads. The next bead, bead 138, is green. So your answer would be green.