Trigger-happy - thanks mum!

I've a few brothers, all self-confessed smartarses. But our arses weren't as smart as mother's. Taken from school at 14 as her greengrocer father needed a bright assistant. No qualifications, but a genius at arithmetic.

With six mouths to feed, she devised a strategy to keep the portion peace. She never dished up. She left it to us boys... but she set the rules. Take a steak pie, for instance, the rules were:

1. Us boys would take turns to cut the pie

2. The pie cutter took the last slice.

With protractor in hand, we quickly leant trigonometry.