SOLUTION: We have 1, 333, 55555, 7777777, 999999999. Select 7 digits so, that their sum will be 50

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Question 620092: We have 1, 333, 55555, 7777777, 999999999. Select 7 digits so, that their sum will be 50
Answer by Edwin McCravy(20055) About Me  (Show Source):
You can put this solution on YOUR website!
An odd number of odd digits will always have an odd number as its sum;
therefore since all we have are odd digits it is impossible for
an odd number, 7, of them to have as a sum the even number 50.

Edwin