July 10, 2018, 11:20 PM 
A user on local forum HardwareZone posted this math problem, supposedly taken from a Primary 6 pupil's homework.
If you can't see the question, here it is.
"One afternoon 5 friends rented 3 bicycles from 5.00pm to 6.30pm and took turns to ride on them. At any time, 3 of them cycled while the other 2 friends rested.
If each of them had the same amount of cycling time, how many minutes did each person ride on a bicycle?"
Here are some of the proposed "answers":
Screenshots from EDMW
[related_story]
A spanner in the works might have been thrown by a teacher who appears to have claimed the answer 54 minutes is wrong:
Do you know the answer? Share it in the comments below!
Other tough math questions:
Top photo via HardwareZone forum post
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