Two trains set off at the same time from each end of a single
straight railway line. A very fast bee starts off in front of the
first train and flies continuously back and forth between the two
trains. How far does Sidney fly before he is squashed between the
If it takes four men one day to build a wall, how long does it take
60,000 men to build a similar wall?
Which segment on a digital clock is lit most each day? Which
segment is lit least? Does it make any difference if it is set to
12 hours or 24 hours?
Every day at noon (Greenwich Mean Time) a boat leaves Le Havre
for New York while another boat leaves New York for Le Havre.
The ocean crossing takes seven days and seven nights.
How many boats on the New York to Le Havre route will the boat
leaving Le Havre today meet during its journey to New York?
Does it change your answer if the boats leave Le Havre and New York
at noon local time. How can you illustrate your answer?