Q What does a female mathematics student wear under her sweater?
A An alge-bra.
A young woman is invited to a fancy-dress party. But when she arrives naked the bouncer says: 'I'm sorry, miss, you can't come in like that. You have to be wearing a costume.'
The woman then returns to her car and puts on some black gloves and some black shoes.
When she goes back to the party the bouncer still looks sceptical but asks: 'So, what have you come as, then?'
The young woman raises her hands and replies: 'I've come as the five of spades.'
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