Stage: 1 Challenge Level: 
You could print out this
sheet to use instead of copying the network
out.
Which number will you have to end on?
You could make a list of the numbers and cross them out as you use them.
Which number will you have to end on?
You could make a list of the numbers and cross them out as you use them.
Addition & subtraction. Counting. Visualising. Multiplication & division. Trial and improvement. Working systematically. Games. Interactivities. Introducing algebra. Factors and multiples.
Published February 2002.
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NRICH is part of the family of activities in the Millennium Mathematics Project, which also includes the Plus and Motivate sites.
email: nrich@damtp.cam.ac.uk