Question 292733
<pre><font size = 4 color = "indigo"><b>
{{{8}}}{{{"÷"}}}{{{2/3}}}{{{"="}}}{{{8/1}}}{{{"×"}}}{{{3/2}}}{{{"="}}}{{{12}}}

{{{2/3}}} of an hour is 40 minutes.  However the answer is 13, not 12, because
a conductor comes in at the beginning of each of the 12 40-minute periods, and
also at the end of the 12th 40 minute period.  Suppose a conductor comes in at
noon, then these are the 13 times:

1. 12:00 NOON
2. 12:40 PM
3.  1:20 PM
4.  2:00 PM
5.  2:40 PM
6.  3:20 PM
7.  4:00 PM
8.  4:40 PM
9.  5:20 PM
10. 6:00 PM
11. 6:40 PM
12. 7:20 PM
13. 8:00 PM  

Edwin</pre>