Norwegian Math Test

A Norwegian fella wants a job, but the foreman won't hire him until he
passes a little math test.

Here is your first question, the foreman said. 'Without using
numbers, represent the number 9.'

'Without numbers?' The Norwegian says, 'Dat's easy.' and proceeds to
draw three trees.

'What's this?' the boss asks.

'Vot! you got no brain? Tree and tree and tree make nine,' says the
Norwegian.

'Fair enough,' says the boss. 'Here's your second question. Use the
same rules, but this time the number is 99.'

The Norwegian stares into space for a while, then picks up the picture
that he has just drawn and makes a smudge on each tree. 'Dar ya go.'

The boss scratches his head and says, 'How on earth do you get that to
represent 99?'

'Each of da trees is dirty now. So, it's dirty tree, and dirty tree,
and dirty tree. Dat is 99.'

The boss is getting worried that he's going to actually have to hire
this Norwegian, so he says, 'All right, last question.

Same rules again, but represent the number 100.'

The Norwegian fella stares into space some more, then he picks up the
picture again and makes a little mark at the base of each tree and
says, 'Dar ya go. Von hundred.'

The boss looks at the attempt. 'You must be nuts if you think that
represents a hundred!'

The Norwegian leans forward and points to the marks at the base of
each tree and says, 'A little dog come along and pooped by each tree.
So now you got dirty tree and a turd, dirty tree and a turd, and
dirty tree and a turd, vich makes von hundred.'

'So, ven do I start?