07:58 Jun 6, 2008 

This is completely true; it changes depending on the context. With the sample sentence of fairs, then I would have suggested "bastantes". But in the context of the real text, then "varios" would be the most appropriate

05:03 Jun 6, 2008 

Para la próxima, por favor no inventes la pregunta sino danos la pregunta real. Es totalmente diferente la situación de "A number of people visited the fair" que "A number of courses have been made". Provocaste que muchas respuestas no sirvieran para nada

04:06 Jun 6, 2008 

Ahora sí, pues.

03:57 Jun 6, 2008 

I actually made up this sentence. Here is the original sentence:
A number of distance learning (or e-learning) courses have been made by the company. A situation that exists when all people, at all times, have physical, social and economic access to sufficient, safe and nutritious food that meets their dietary needs and food preferences for an active and healthy life. Information for Action (FSIA) Programme. Courses consist of three to six self-paced e-learning lessons of approximately 30 to 45 minutes duration each. Each course also comes with a set of PowerPoint slides, handouts and exercises, which can be easily customized by trainers to help develop their own face to face training materials.

03:06 Jun 6, 2008 

Todo se resume en esto: CONTEXTO, porfa.

03:04 Jun 6, 2008 

No, "a number of" people deja las cosas totalmente en el aire. No es necesariamente una multitud de gente. Según el CONTEXTO (que no señalas) puede tratarse de "varias personas" que visitaron la feria, pero no un gran número, mucho menos una multitud.