"The kid starts cackling, and I realise he invented his own question in order to trick me into saying it," the teacher wrote.

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If you're looking to re-sharpen your maths skills, then this tricky equation is perfect for you. An exam question aimed at school children aged 10 to 11 is causing major problems for adults on US ...

A GCSE maths question is so difficult, it left 85% of people scratching their heads in a bid to try and answer it correctly. The month of May signals the start of exam season, with millions of pupils ...