BIDMAS?

In maths this morning Matt asked me a question.

"Do you add first or times first?  Each way will give different answers"

I couldn't believe he had asked me that.  From about the age of 10 people are taught that you do brackets, powers, division, multiplication, addition and finally subtraction in that order.
Everyone in a Y7 maths lesson knows the acronym BIDMAS (or BODMAS. The I and O stand for indices and order respectively).
So after that question Matt has failed his degree.  Poor Matt.

In other news, someone drank my milkshake! It made me angry.  You may remember reading in a previous post, Lecture? No. Lecture? No. Bacon? YES., that my flatmate Sam had mentioned a food thief in the flat.  At the time I hadn't been able to think of anything that had gone missing besides a crust from a loaf of bread.  However, since the conversation I remembered that a slice of my home-made flapjack had mysteriously vanished from my shelf in the fridge.  At the time I'd shrugged it off and put it down to me forgetting that I'd eaten it but after finding out there is a food thief I began to wonder whether or not it was the correct conclusion to come to.
So with all the talk of food thieves, when I decided to put a half empty bottle of banana milkshake in the fridge I thought it might be a good idea to draw a line on the bottle so I knew exactly how much was left.  Indeed it was a good idea; today when I took my milkshake out of the fridge and checked to see how much was left, I found the level to have dropped by an inch!
I have been struck by the food thief too!
I decided to draw another line on at the new level of the milk and put it back in the fridge without drinking any myself.  As if I want to put a bottle that someone else has drank from against my lips.  Maybe I should fill it up with bleach to the level it was at when I first put it in the fridge and hope that they have another sneaky swig.