Train A leaves Station 1 traveling at 60 mph. Train B leaves Station 2 traveling towards Station 1 at 40 mph on the same track. They start 200 miles apart. How far apart are they 1 hour before impact?
100 miles
Their combined speed of approach is 60 + 40 = 100 mph. Thus, 1 hour before collision, they must be 100 miles apart.
About this riddle
Math riddles hide a calculation inside a short story. Pull out the numbers, work out what is being asked, and watch for a trick such as a unit change.
Difficulty: Medium. More like this: Math riddles with answers or try Target 24 for a different kind of puzzle.
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