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Count the Crayons

Stage: 1 Challenge Level: Challenge Level:1
Imagine grouping the items into 10s.

Here is an example which leads me to believe that there are approximately 50 items in this picture. To be on the safe side, I will give a range as my answer and say that I think there are between 40 and 60 items.


Can you use a similar approach? Can you use a different approach?