Question

What is the smallest number of florins that must be given to discharge a debt of pounds $1.6s.6d$., if the change is to be paid in half-crowns only?

Answer 1

$⟹1$ florin $=24$ pence
Debt $=318$ pence
Half-crown $=30$ pence
So, the person can give $17$ florins $=408$ pence
and in return can take
$=408-318=90$ pences
i.e., $3$ half-crowns.