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

Puzzles and Curious Problems by Henry Ernest Dudeney: $166$

Hens and Tens

If ten hen-pens cost ten and tenpence (that is, $10 \shillings 10 \oldpence$),

and ten hens and one hen-pen cost ten and tenpence,

what will ten hens without any hen-pens cost?

Sources

• 1932: Henry Ernest Dudeney: Puzzles and Curious Problems ... (previous) ... (next): Arithmetical and Algebraical Problems: Various Arithmetical and Algebraical Problems: $166$. -- Hens and Tens