Once a classmate of mine challenged me that I can't score greater than him in the half yearly term he specially quote "in mathematics it's impossible for u to beat me" and he told this in a very annoying manner. I prepared with my full effort within the time left for the exam and I can't beat him in that term but we both score equal marks. Though I haven't scored higher than him but I was happy, and he though scored good marks but.. From that time it's with me & i used it for reference too..