17 September 2010

Question of the Day - 17 September 2010

In a barn there are hens, dogs and spiders; there are twice as many hens as dogs and there are twice as many spiders as hens; altogether there are 680 legs; how many dogs are there?

Dans une grange il y a des poules, des chiens et de araignées; il y a deux fois plus de poules que de chiens et deux fois plus d'araignées que de poules; en total il y a 680 pattes; combien de chiens y a-t-il?