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'Oh! Harry!' printed from http://nrich.maths.org/
A group of eight children in Class 6 were measuring water using
measuring cylinders. They coloured the water to make reading the
They lined up the cylinders in two neat rows, each labelled with a
child's name and the amount they had measured out.
Then Harry opened the window and the wind blew most of the labels
onto the floor! "Oh! Harry!" they all wailed. Can you relabel the
cylinders for them?
Ahmed had measured out just a thousand millilitres and Belinda
twice as much as Ahmed.
Grace had measured out three-quarters of the amount that Belinda
had done and Freddie had half the amount that Ahmed had measured
Which were their cylinders?
Callum had coloured his water blue. How much did he measure
Ellie had coloured her water pink and Dan coloured his orange. How
much did they measure out?
"Don't drink that!" Harry had laughed, pointing at Dan's cylinder,
"It's not orange juice!" As his hand stretched out he knocked over
his red liquid. "Oh! Harry!" they all wailed again.
How much was left in Harry's cylinder after the accident?
You can download a resource
of the measuring cylinders.