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Thank you to Keya, Brodie, Ayali and Alex from Strand on the Green Junior School who sent in these solutions:
Challenge 1:
Challenge 2:
Challenge 3:
They said:
We noticed that the numbers are all multiples of 4 and if you add 1 to one of the dimensions the number of rods goes up by 4.
Well done for laying out these solutions so clearly!
There are some more possible solutions to Challenge 3. If anybody has found more solutions and would like to let us know, or if you have any different ideas about this activity that you'd like to share with us, please email us.