Two problems that will make you want to throw a chair at someone, from John Jackson, *Rational Amusements for Winter Evenings*, 1821:

I.

If from six ye take nine, and from nine ye take ten

(Ye youths, now the mystery explain;)

And if fifty from forty be taken, there then,

Shall just half a dozen remain.

II.

One third of twelve, if you divide,

By just one fifth of seven,

The true result (it has been tried,)

Exactly is eleven.

How? Why?