The answer to 685 divided by 49 = 13.979
√23-irrational
104.42-rational
√64-irrational
49.396-rational
10.97846727460-rational

I'm confused too but that what i got
165 Ting Ting's beads* (4 Sherrie's beads/ 5 Ting Ting's beads)= 132 Sherrie's beads.
132 Sherrie's beads* (1 Roxanne's bead/ 2 Sherrie's beads)= 66 Roxanne's beads.
Now that we know the number of beads Roxanne and Ting Ting have, let's subtract:
165 beads- 66 beads= 99 beads.
Hope this would help :))