1,000 decades
60
A score is 20. 20 x 20 is 400. That is 4 centuries.
Three scores is equal to three times twenty, which is sixty years.
A score is 20. So a century is 5 score.
There are 400 years in four centuries.
Three score and 9 centuries would be 3 X 20 + 9 = 69 centuries, or 6,900 years. A score is simply 20, just as a dozen is 12. A score of years would be 20 years, four score and seven apples would be 4 X 20 + 7 = 87 apples.
A score of years is 20 years. A century is 100 years.
620
300 years is three centuries. 100 years is one century.
520
score = 20century = 100 years20 + (2 × 100) = 220220 years
Three centuries is 300 years, so 300 + 79 would be 379 years.
300
60
A score is 20. 20 x 20 is 400. That is 4 centuries.
That would be 77. The word "score", when speaking of years or numbers, comes to mean "20".
72 centuries