He got that grade because he was being too clever - he hadn't answered the question in the way the marking scheme had been aligned.

Earlier in the day another cofounder and chief executive had a little more trouble answering the question of how to make money.

To answer the question, you had to look to letters and diaries for clues.

One good way to set goals is to take a step-by-step approach, so try answering the question below.