Final answer:
A century minus 3 scores is equal to 40.
Step-by-step explanation:
A century is a period of 100 years. A score is a group of 20. So, if we subtract 3 scores from a century, we subtract 3 groups of 20 from 100.
3 scores is equal to 3 x 20 = 60.
Therefore, a century minus 3 scores is equal to 100 - 60 = 40.
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