Triplets

Find as many sets of triplets as
possible which add up to 40

 

30 15 6 32
40 3 11 14
29 27 4 7
5 28 31 33

Triplet Triplet Triplet

Teacher: Collect together students' findings by clicking on the numbers above.

 

 

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Topics: Starter | Arithmetic | Mental Methods

  • Mike Sendrove, Salt Grammar School, UK.
  • Thursday, May 25, 2006
  • "A really useful set of resources - thanks. Is the collection available on CD? Are solutions available?"
  • Transum,
  • Thursday, May 25, 2006
  • "Sorry Mike, because some of the starters link to live data on the Internet there is no CD version. Thanks for your comments."
  • Mrs Lewis, Year 8, Hartford High School
  • Thursday, April 10, 2008
  • "My class worked on this for 5 minutes individually and then we collated the results. As a class they were able to find 15 different combinations."
  • Mrs. Babb's 4th Period, Woodruff High School
  • Wednesday, April 07, 2010
  • "We only found 11...Are you sure there are 15?"
  • Asteroids - Yr3, Otford, Kent
  • Friday, May 14, 2010
  • "We work hard on this for our early work and found 18. We're very proud of ourselves for being so smart."
  •  

  • Mr Morriss, Montgmery High School
  • Wednesday, April 27, 2011
  • "Love these types of starter as they are great for any ability. They get the students motivated if they can see that you value their answers, I collected the results on the whiteboard but had to write them all out which was a bit time consuming and would have taken longer had I got the students to do it. To make it more practical to do this, if it was made more interactive so either the teacher or student could use a whiteboard pen or click on the three numbers and it writes the numbers they picked at the side to the class can see them and if they repeat one it shows them by highlighting that its already been found. Would be a massive help with these type of starters. But the website is great please keep them coming, my classes and I love them."
  • Transum,
  • Wednesday, May 04, 2011
  • "Good idea Mr Morriss. The squares above are now clickable as you described. Thanks for your comments."
  • Year 8, Codsall Middle School
  • Thursday, June 16, 2011
  • "We found 38 and are very proud! :)."
  • Mr Chadwick, Concord Junior School
  • Friday, June 24, 2011
  • "We found 24 using all sorts of different combinations!"
  • Mr Vairy, Corfe Hills School
  • Tuesday, July 03, 2012
  • "My year 10s destroyed this!"
  • #DJStar, Kristin
  • Wednesday, April 10, 2013
  • "Switch round the numbers on one equation and it gives you like 5..."
  • Mr Kavanagh's Fifth Class, Cork, Ireland
  • Wednesday, April 10, 2013
  • "We managed 36 different combinations, however we did use numbers twice and allowed all different arrangements of numbers in a sum."

How did you use this starter? Can you suggest how teachers could present or develop this resource? Do you have any comments? It is always useful to receive feedback and helps make this free resource even more useful for Maths teachers anywhere in the world.
Click here to enter your comments.

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This starter has scored a mean of 4.3 out of 5 based on 47 votes.


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Here are some triplets. Did you find any more?

33+3+4 28+5+7 27+6+7
29+5+6 31+4+5 30+4+6
32+3+5 11+14+15  

Note to teacher: Doing this activity once with a class helps students develop strategies. It is only when they do this activity a second time that they will have the opportunity to practise those strategies. That is when the learning is consolidated. Click the button above to regenerate another version of this starter from random numbers.


Laptops In Lessons

Teacher, do your students have access to computers?
Do they have Laptops in Lessons or iPads?

Whether your students each have a TabletPC, a Surface or a Mac, this activity lends itself to eLearning (Engaged Learning).

Laptops In Lessons

Here is the URL for a concise version of this page without comments or answers.

Transum.org/go/?Start=April10

Here is the URL which will take
them to a student version of this activity.

www.transum.org/go/?to=Triplets