Sardar GurbachanSinghisappearing forhisUniversity final examination which consists ofY/N type questions. He takeshis seat in the examinationhall, stares atthe question paper for five minutes,and then in a fit of inspirationtakes his wallet out, removes a coin and starts tossing the coin and marking the answer sheet - Y for Heads and N for Tails.Within half an hour he is all done whereas the rest of the class is sweating it out. During the last few minutes, he is seen desperately throwing the coin, swearing and sweating. The invigilator, alarmed, approaches him and asks what is going on.

"Oye, I finished the exam in half and hour".

"But yaar", he says, "I am rechecking my answers and am not able to tally them with what I wrote."