Metric Time
I love how the example is super confusing.<p>You sleep 3.33… metric hours.<p>You fall asleep 9:50 metric time.<p>You'd think we can just interchange the . and : so you should wake up 12:83…, or 2:83… the next day.<p>But no, it's apparently 2:75 metric time. Why?<p>Also nice how they IMMEDIATELY ran into a continuing fraction 1/3, which is exactly the point of the 60-minute hour, 24-hour day, or 360-degree circle: lots of factors.