15 year old pennies are essentially the same size as those minted today. You'd have to go back to 1857 to find pennies that were significantly larger.
If you are talking dollars then the answer is 400,000 if you are talking old English pounds then the answer would be 960,000 pennies
If there is roughly 165 U.S. pennies in a pound of mixed (old and new) pennies, times 53 pounds, the total would be about $87.45.
Tuppence is an old English word, it means two pennies. There were two pennies in a shilling and twenty shillings in a pound.
Each Line is a Different Way (11 Ways)100 Pennies & 0 Dimes90 Pennies & 1 Dimes80 Pennies & 2 Dimes70 Pennies & 3 Dimes60 Pennies & 4 Dimes50 Pennies & 5 Dimes40 Pennies & 6 Dimes30 Pennies & 7 Dimes20 Pennies & 8 Dimes10 Pennies & 9 Dimes0 Pennies & 10 Dimes