Here's a quiz you'll probably find even harder than Cheryl's birthday

Emily Shackleton
Thursday 16 April 2015 18:00
news

You all tied yourself up in knots over Cheryl's birthday - the school maths problem that befuddled the world. But you haven't seen anything yet.

Here are some more near-impossible brain teasers - let us know how well you did in the comments:

More: Meet the child prodigy about to start her maths degree

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