Úloha ID 1488 - 
Four excavators get rid of two tons of mud in 2,5 hours. How long does it take seven excavators to get rid of five tons of mud?
Správná odpověď je: E
Jeden bagr se zvládne sám zbavit jedné tuny bahna za 5 hodin (čtyři bagry dvou tun za 2,5 hodiny, dva bagry jedné tuny za 2,5 hodiny). Sám by se tedy pěti tun zbavoval 25 hodin a sedm bagrů to zvládne přibližně za 3,57 hodin.
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