[Source:  Smithsonian Magazine.com]

There are some people—incredibly intelligent people, no less—for whom a grasp of numbers is entirely elusive. Is 6 bigger than 5? What is halfway between 200 and 400? If I give you $10 for a $7.50 purchase, what is my change? If answering these and similar questions, not exactly feats of mathematical expertise of the highest order, is difficult and frustrating, that could be, says Ewen Callaway in Nature, a sign of a neurological discrepancy known as dyscalculia.
Affecting somewhere from 2.5 to 7.5 percent of the population, dyscalculia, “sometimes called number blindness and likened to dyslexia for maths,” won’t just preclude you from a happy career in accounting but can actually make day-to-day life strenuous. Time:

Though you may have never heard of it, the condition is much more than being bad at math. “You need to hear people suffering from dyscalculia, how hard it is for them to do everyday

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