A printing shop kept a log of how many sheets of paper were used in the past 4 days.
| Sheets of paper used | |
|---|---|
| Day | Number of sheets of paper |
| Thursday | 638 |
| Friday | 669 |
| Saturday | 636 |
| Sunday | 689 |
On which day did the printing shop use the fewest sheets of paper?
Thursday
Friday
Saturday
Sunday
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