Triplets

How many triplets can you find?
Find as many sets of triplets as possible which add up to 30

20 15 6 22
30 3 1 14
19 17 4 7
5 18 21 23

TripletTripletTriplet

 

 

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Keywords: 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."

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This starter has scored a mean of 4.3 out of 5 based on 8 votes.
 

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Here are some triplets. Did you find any more?

23+3+4

18+5+7

17+6+7
19+5+6 21+4+5 20+4+6
22+3+5 1+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.