Dyscalculia

Alex Bellos discusses how the Incans used knots in string (Quipu) to record numbers.Check out Brilliant (get 20% off their premium service): https://brillian...

An expert on on cognitive neuropsychology speaks to us about his research on the seldom-discussed "dyslexia for numbers".

Professor Brian Butterworth is based at University College London.

Dyscalculia is a learning disability involving mathematics and numbers.