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?
We had many correct solutions to this one including a spreadsheet from Brian, Michael, Jon, James, Eli and Sam from Queen's College Junior School in Taunton, showing how far the trains and fly had travelled at each second after the trains set off.
Thomas from Darley Dale Primary School explained his solution like this:
Joe from Haslingfield worked it out as follows:
Well done to you all and to everyone else who answered this problem correctly: Steven from Whybridge Junior School,
Robert from Ardingly College Junior School,
Charlotte from Winterton Juniors,
Helena, Sarah and Tom from Colyton Grammar School,
Samuel from Geneva English School,
Charlie and Ian from William Lovell School,
Natalie, Matilda and Laura, Elle and Cat from The Mount School,
Mandy Appleyard from Ashlyns School,
Lawrence from Beecroft Public School (NSW, Ausralia),
Salma from Balwearie High School,
Andrew and Yuming from The Perse School for Boys,
Alex from St Edwards School,
Matthew from Waverley Christian College,
Sean from St. Andrew's School...