Arrange the numbers on the yellow tiles so that the sum of the numbers in the vertical line is the same as the sum of the numbers in the horizontal line
How many different ways are there of doing this task?
A selfchecking, interactive version of this activity with 30 different puzzles is
here.
Answers
Here are all of the 36 possible solutions.
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Numbers and the Making of Us
I initially heard this book described on the Grammar Girl podcast and immediately went to find out more about it. I now have it on my Christmas present wish list and am looking forward to receiving a copy (hint!).
"Caleb Everett provides a fascinating account of the development of human numeracy, from innate abilities to the complexities of agricultural and trading societies, all viewed against the general background of human cultural evolution. He successfully draws together insights from linguistics, cognitive psychology, anthropology, and archaeology in a way that is accessible to the general reader as well as to specialists." more...



Teacher, do your students have
access to computers? Do they have iPads or Laptops in Lessons?
Whether your students each have a TabletPC, a Surface or a Mac,
this activity lends itself to eLearning (Engaged Learning). 

Here a concise URL for a version of this page without the comments.
Transum.org/go/?Start=February3
Here is the URL which will take them to a related student activity.
Transum.org/go/?to=plane