Pocket Money
Unreviewed import — a classic from the public domain; its solution has not been machine-checked yet.
math
What is the largest sum of money--all in current silver coins and no four-shilling piece--that I could have in my pocket without being able to give change for a half-sovereign?
Solution
Commit an attempt to unseal the proof. Write your answer — right or wrong, thinking it through is the point.
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