How Many Is Threescore

being or containing three times twenty; sixty.

What is three score and ten in the Bible?

‘Three score and ten’ is the nominal span of a human life. In the days that this expression was coined that span was considered to be seventy years.

Why is 20 referred to as a score?

score (n.) late Old English scoru “twenty,” from Old Norse skor “mark, notch, incision; a rift in rock,” also, in Icelandic, “twenty,” from Proto-Germanic *skur-, from PIE root *sker- (1) “to cut.” The connecting notion probably is counting large numbers (of sheep, etc.)