Keywords: Starter | Arithmetic | Investigations | Puzzles

• Mairi Salters, Burwell VC Primary School
• Thursday, June 21, 2007
• "I copy the pages onto a flipchart on the electronic whiteboard. That way the class can take their time at it, as we use it as a half-hour settling in activity rather than a starter to the numeracy lesson proper. I use it with a Year 4 clsas, so a lot of the starters are too advanced for them. However, they have got on well with the ones we have used. Would be delighted to see similar written specically for KS2!"
• J.Hesmer, Filsham Valley
• Thursday, June 11, 2009
• "I found this an awful starter, it was incredebly difficult for my YEAR 7 group!"
• L Martin, Canterbury
• Tuesday, June 23, 2009
• "I tried it with my Year 7s. They did it in 20 seconds flat. We extended it to algebra, to prove it."
• L. Northern, Hayle School
• Tuesday, May 18, 2010
• "We had a long discussion, we found out that:
  1. The middle number has to be odd
  2. If all the numbers are odd or all the numbers are even, it will always work
  3. When you chose a middle number, you have to have the smallest and largest above it, and the middle numbers either side.
  We thought it was a good problem.
  Hayle School Year 7 maths class."

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This starter has scored a mean of 3.7 out of 5 based on 81 votes.

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