Henry Ernest Dudeney/Puzzles and Curious Problems/166 - Hens and Tens/Solution

by : $166$

 * Hens and Tens

Solution

 * $9 \shillings 9 \oldpence$

Proof
Let $h$ pence be the cost of one hen.

Let $p$ pence be the cost of one hen-pen.

We have that:
 * $10 \shillings 10 \oldpence = 130 \oldpence$

Hence:

Converting from pence into shillings and pence is all that remains to be done.