SOLUTION: If the average of 3 consecutive odd numbers is 9, find the largest number?

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Question 1089399: If the average of 3 consecutive odd numbers is 9, find the largest number?
Answer by ikleyn(52803) About Me  (Show Source):
You can put this solution on YOUR website!
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Problems like this one are solved MENTALLY.


Answer.  The numbers are 7, 9, and 11.   The largest is 11.


The lesson to learn from this solution. 

    The middle number of the three consecutive numbers is exactly their average.

    The middle number of the three even consecutive numbers is exactly their average.

    The middle number of the three consecutive odd numbers is exactly their average, i.e. 9 in this case.