IMO Shortlist 1999 problem C3
Kvaliteta:
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Avg: 7,0 A biologist watches a chameleon. The chameleon catches flies and rests after each catch. The biologist notices that:
- the first fly is caught after a resting period of one minute;
- the resting period before catching the fly is the same as the resting period before catching the fly and one minute shorter than the resting period before catching the fly;
- when the chameleon stops resting, he
catches a fly instantly.
- How many flies were caught by the chameleon before his first resting period of minutes in a row ?
- After how many minutes will the chameleon catch his fly ?
- How many flies were caught by the chameleon after 1999 minutes have passed ?
- the first fly is caught after a resting period of one minute;
- the resting period before catching the fly is the same as the resting period before catching the fly and one minute shorter than the resting period before catching the fly;
- when the chameleon stops resting, he
catches a fly instantly.
- How many flies were caught by the chameleon before his first resting period of minutes in a row ?
- After how many minutes will the chameleon catch his fly ?
- How many flies were caught by the chameleon after 1999 minutes have passed ?
Izvor: Međunarodna matematička olimpijada, shortlist 1999