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100 pennies equals a pound in the current decimal system. Before 1971, a pound sterling was divided into 240 pence.
Depends on their dates. Pennies before 1982 weigh 3.11 grams. Pennies from 1983 to now weigh 2.5 grams. Pennies dated 1982 could weigh either amount. An ounce equals 28.35 grams. Separate your coins into piles by date and get out your calculator.
Cents weigh different amounts depending on their dates. Before 1982, cents weighed 3.11 grams. Cents issued after 1982 weigh 2.5 grams. Cents issued DURING 1982 could weigh either amount (is this getting complicated enough?) A pound is equivalent to 453.6 gm, So with pennies made before 1982 it would take 146 pennies to get 454.6 grams... With pennies made after 1982 it would take 182 pennies.
US pennies have never been made of silver.
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