'Coins' in the Bible

"Aren't five sparrows sold for two assaria coins? Not one of them is forgotten by God.

Or what woman, if she had ten drachma coins, if she lost one drachma coin, wouldn't light a lamp, sweep the house, and seek diligently until she found it?

He called ten servants of his, and gave them ten mina coins, and told them, 'Conduct business until I come.'

He saw a certain poor widow casting in two small brass coins.