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 managed to
find the right answer.
Robyn from the Katherine Semar Junior School
was one of the first to send in a correct answer:
Robert and Joel from Cowbridge
Comprehensive also sent in correct solutions.
Here is Robert's nice piece of detective
Robert goes on to consider on which side of
the pentagon the dot must have been placed:
Thank you Cristina, from City of London
School for Girls, for sending us a very comprehensive