Úloha ID 233 - 
Matematikům Petrovi, Mírovi, Honzovi a Tomášovi se na soustředění při návratu ze Sněžky povedlo stihnout o dvě hodiny dřívější autobus na chatu než vedoucím a tak se rozhodli, že si skočí ještě na pivo(a). Tomášovi trvá vypití piva 1,4 krát déle než Honzovi, Honzovi 1,3 krát déle než Mírovi a Mírovi 1,2 krát déle než Petrovi. Petr vypije pivo za 10 minut. Kolik nejvíce si mohl dát Tomáš piv, aby chlapci odešli ze zahrádky hospody dříve, než okolo projdou vedoucí?
Správná odpověď je: C
Čísla jsou zaokrouhlována na celé minuty.
| Tomáš | Honza | Míra | Petr | počet piv |
| 22 | 16 | 12 | 10 | 1 |
| 44 | 31 | 24 | 20 | 2 |
| 66 | 47 | 36 | 30 | 3 |
| 87 | 62 | 48 | 40 | 4 |
| 109 | 78 | 60 | 50 | 5 |
| 131 | 94 | 72 | 60 | 6 |
Pozn. Úloha je fiktivní, smyšlená, není založená na pravdivých informacích a nemá výchovný charakter :−)
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