John, David, George, Edward and Robert were the five competitors in a race yesterday. Angela wants to know the result of the race, but they will only tell her who won out of any pair that she asks about. So far, Angela has been told the following: John beat Edward,
David beat George,
Robert beat Edward,
David beat John.
Which two of the competitors should Angela ask about so that she can deduce who won the race?

a. George and Edward
b. David and Robert
c. George and Robert
d. John and George

like many students at university, you may be unhappy about the results you attain in exams. you may feel that even with all you are doing there must be something more -- or different-- you could be doing to get better grades. we have all at some time or other heard of that student who only studies a couple of hours for final exams and scores a's every time. we stand in awe of those who seem to breeze through without undue effort and seem to need very little in the way of studying to nail an exam. the reasons for success, in what i think are the vast majority of cases, are less esoteric than many students think: successful students consistently apply a series of productive strategies with view to attaining clearly identified learning and grade goals throughout the academic term.