Solve if U R genius

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Many times in Linkedin (or in your email) you may find images like these: or (courtesy of https://www.linkedin.com/pulse/solve-you-genius-stebin-chacko  )   The latter annoys us a lot. Because the first is just a system (write in geometrical symbol instead of math symbols). But why instead of write 8 = f(2,2) and finally what’s f(9,9), use this […]