Multiples and factors. Prime numbers  
INTRODUCTION  
These activities are designed
as games and as small mathematical investigations; before doing them, students
must have already studied all the concepts and principles mentioned in them.
These activities raise questions aimed to be starting points for small investigations done by students. The teacher may suggest any other activity and can also make the most of the ideas hinted at by the students themselves. 

OBJECTIVES  

Eduardo Barbero Corral 
Spanish Ministry of Education. Year 2007  
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