When a fair coin is tossed, what is the probability of heads?
Answer1/2
A fair coin has two equally likely outcomes, so heads has a probability of one half.
History · Facts & stats
Coin facts & stats
7 fact-checked facts about coins, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
Which metal has traditionally been used for the highest-value coins?
AnswerGold
Gold's rarity and resistance to corrosion made it the classic metal for high-value coins.
Going deeper
What is the study and collecting of coins called?
AnswerNumismatics
Numismatics is the study of coins and currency; philately is stamp collecting.
The earliest known coins were made in Lydia, which is in modern-day where?
AnswerTurkey
Lydia, in western Anatolia (modern Turkey), produced some of the first coins around the 7th century BC.
The first Lydian coins were made of electrum, a natural alloy of which metals?
AnswerGold and silver
Electrum is a naturally occurring mix of gold and silver.
Expert level
The Spanish silver coins called "pieces of eight" were worth eight of what?
AnswerReales
Pieces of eight were Spanish dollars worth 8 reales, used worldwide for centuries.
What is the blank metal disc called before it is struck into a coin?
AnswerA planchet
A planchet, also called a blank or flan, is the disc of metal that dies stamp into a finished coin.
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