# In which page the bookmark is?

In which page the bookmark is?

• This 3-acts opera could be done as a group activity:
• The teacher distributes books among students
• In pairs, one students put the bookmark in a page of one book and ask to guess the page. The only provided information is the total number of pages of the book.
• The take note of the answer and the page where the bookmark has put.
• Swap the roles.
• The best mean approximation wins
• The previous activity could be modified introducing measuring with ruler the position of the bookmark and the width of the book