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The mean of the set of numbers 8, 4, 5, 4,
, 
and 6 is 6.
If another is added to the set, then the mean is still 6.
What numbers do and represent?
This problem is adapted from the World Mathematics Championships
Mean Balance
Age 14 to 16
ShortChallenge Level 
The mean of the set of numbers 8, 4, 5, 4,
, and 6 is 6.If another
is added to the set, then the mean is still 6.What numbers do
and represent?This problem is adapted from the World Mathematics Championships
You can find more short problems, arranged by curriculum topic, in our short problems collection.
