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Amy's Dominoes

Stage: 2 Challenge Level: Challenge Level:2 Challenge Level:2

Well Amy and her dominoes had more than one problem this month! As Edward from Tattingstone Primary School wrote:

There are 28 dominoes in a complete set. All of the spots add up to 168.

You were asked, if there were 125 spots on the dominoes Amy had, what could the four missing dominoes be? That would mean the dots on the four missing dominoes add up to 43. Alice , Kim , as well as Rebecca and Jamie from Harden Primary School, each figured out the missing pieces had to show: 6and 6, 5 and 6, 4 and 6 and also 5 and 5.

Was there any other possible combination? How about if there was one spot less missing - so that there were 126 spots. What might the possibilities be? Would there be more, fewer or could the problem not be solved?