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
A security camera, taking pictures each half a second, films a
cyclist going by. In the film, the cyclist appears to go forward
while the wheels appear to go backwards. Why?
How far have these students walked by the time the teacher's car
reaches them after their bus broke down?
Congratulations to those of you who
deduced the correct answer to this problem.
Cameron from Boroughbridge Primary was
one of the first to send in a solution. He used a combination of
observation and trial and error to begin the problem:
He then considered on which side the red dot
should be placed:
Robert from Cowbridge Comprehensive sent in a
solution with slightly different reasoning: