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I studied for four hours. I added 2 more hours every day for a week. How many more days do I have to study until I have spend 20 hours studying?
11 years ago

Answers

Reiny
you have an arithmetic series:

4 + 6 + 8 + ...
Easy to see that after 3 days, you will have already spent 18 hours,
so you need one extra day of only 2 more hours to have a total of 20 hrs.
11 years ago

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