Hey Gayathri chand, ur last ques. is quite similar to what an interviewer asked an iim candidate. He was asked to either solve a simple Math Problem or answer one difficult question? He said he would prefer to answer one difficult question. He was asked "Who came first- hen or egg.?" The candidate instantly replied Hen.When asked why he said hen,his reply was "Sir ,you said u will ask only one difficult question"
Regards
Jassi