0 Question: What is the most difficult maths problem you have ever come across Keywords: difficult, maths, problem Asked by anon-174185 to Hayley on 19 Jun 2018.
Hayley Wragg answered on 19 Jun 2018:
One of the most difficult problems I’ve seen solved is how to turn a sphere inside out. https://www.youtube.com/watch?v=R_w4HYXuo9M
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