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13 Jan 2026, 12:26
Kudos
Bookmarks
Number of overdue days: 5
Total fine: 10
A library’s late-return fine increases each day by a fixed amount. The fine on the first overdue day is $1, and each subsequent day the fine increases by $0.5 more than the previous day’s fine.
Select for Number of overdue days and for Total fine in dollars numbers that could be the number of days a book is overdue and the total fine charged that would be jointly consistent with the given information. Make only two selections, one in each column.
Select for Number of overdue days and for Total fine in dollars numbers that could be the number of days a book is overdue and the total fine charged that would be jointly consistent with the given information. Make only two selections, one in each column.
| Number of overdue days | Total fine | |
| 4 | ||
| 5 | ||
| 6 | ||
| 8 | ||
| 10 | ||
| 12 |
ShowHide Answer
Official Answer
Number of overdue days: 5
Total fine: 10
13 Jan 2026, 12:26
Kudos
Bookmarks
Official Solution:
The fine starts at $1 on the first overdue day and increases by $0.5 each day. We are looking for two numbers from the list such that one number can represent the number of overdue days, and another number can represent the total fine accumulated up to that day.
Day 1: daily fine 1, cumulative total 1
Day 2: daily fine 1.5, cumulative total 2.5
Day 3: daily fine 2, cumulative total 4.5
Day 4: daily fine 2.5, cumulative total 7
Day 5: daily fine 3, cumulative total 10
...
Both 5 (days) and 10 (total fine) appear in the list. So:
Number of overdue days = 5
Total fine in dollars = 10
Correct answer:
Number of overdue days "5"
Total fine "10"
Bunuel
The fine starts at $1 on the first overdue day and increases by $0.5 each day. We are looking for two numbers from the list such that one number can represent the number of overdue days, and another number can represent the total fine accumulated up to that day.
Day 1: daily fine 1, cumulative total 1
Day 2: daily fine 1.5, cumulative total 2.5
Day 3: daily fine 2, cumulative total 4.5
Day 4: daily fine 2.5, cumulative total 7
Day 5: daily fine 3, cumulative total 10
...
Both 5 (days) and 10 (total fine) appear in the list. So:
Number of overdue days = 5
Total fine in dollars = 10
Correct answer:
Number of overdue days "5"
Total fine "10"
