A bottle of beer was revising for a maths exam. It was a bottle of Abbaye de Leffe (6.6% ABV) and it was having trouble understanding the way in which Pascal's Triangle determines the coefficients which arise in binomial expansions. A mouse who happened to be watching laughed and said, "You'll never get to grips with that problem." The bottle of beer was annoyed and demanded, "Why not?" The mouse laughed even louder and said, "Because you're a blonde beer!"

¶ Stick to what you know best.