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Weekly Problem 31 - 2012

Weekly Problem 31 - 2012

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Weekly Problem 32 - 2012

Weekly Problem 32 - 2012

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Weekly Problem 34 - 2012

Weekly Problem 34 - 2012

Weekly Problem 38 - 2007

Stage: 3 Challenge Level: Challenge Level:1
7 7 5 7 ?

The mean, median and mode of the numbers above are the same. What is the missing number?

This problem is taken from the UKMT Mathematical Challenges.

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