A Mathematics Lesson Starter Of The Day


Try many different starting numbers in the flowchart above.
Which starting numbers reach one the fastest?


Topics: Starter | Arithmetic | Investigations | Number

  • Kerry Grindle, Litherland High School
  • On the Starter of the Day for October 13th, if you follow the flow chart exactly then the number 1 should never have been written down at the end.
  • Graham Ingram, Furness School
  • Excellent 10 GI love it
  • Mr Fawer, Class 6
  • My class loved it.
  • Borris, Ilkeston
  • The lowest power of 2 that is also bigger than 5 is 8, which is the answer.
  • Mr M's Year 8s, Canggu Community School
  • This gave Aria a headache, but everyone else loved it! Thanks :).
  • Year 6, Bryanston Square CE
  • We struggled with this and failed to understand how so many numbers were generated. Is this higher level maths?
  • David, Illinois
  • The end of the flowchart should go to the second bubble, "write it down," not the first.
    This is an employment of the Collatz Conjecture http://en.wikipedia.org/wiki/Collatz_conjecture, basically, any number (save for a few) should eventually end at 1.

    [Transum: Thanks David for sharing the link to the Collatz Conjecture information. Regarding the flow chart, it is meant to show returning to the second bubble.]
  • Class 5, Lady Royd PS
  • We found it easy and loved it.
  • XD,
  • You should have never have said over 5. You should have said 5 to a limit because kids start choosing numbers like 1,000,000 and then it's too hard so they give up.
  • Mr Poxon, Valley Gardens Middle School
  • Year 5 at VGMS enjoyed it. Got the understanding!

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Laptops In Lessons

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).

Laptops In Lessons

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Student Activity

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Student Activity

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