I had some colleagues in College who took a degree in Math on their first two years. After finishing their second year, they shifted to a different course. They already finished from Algebra to Calculus and they were in an even higher math. They were asked to prove that 1 + 1 = 3 This is obviously wrong in arithmetic. But in what branch of mathematics is it possible to prove that 1 + 1 = 3? How would you prove that then? What is the solution? I have another colleague who said she was grateful she never took Mathematics because, even though she can manage Calculus, higher maths are so abstract that you cannot visualize them anymore.