SOLUTION: Evelyn forgot her locker number at school. She remember that the sum of the digits is 11 and that the digits are odd numbers. She also knows that there are 140 lockers. Find Evelyn

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Question 1090816: Evelyn forgot her locker number at school. She remember that the sum of the digits is 11 and that the digits are odd numbers. She also knows that there are 140 lockers. Find Evelyn's number.
Answer by ikleyn(52798) About Me  (Show Source):
You can put this solution on YOUR website!
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It can not be a two-digit number (two odd digits can not sum up to 11, which is the odd number).


Hence, it is three-digit number.


Then the first digit is 1. It can not be nothing else.


Then the sum of the two other digits is 10, and they are odd digits.


There are 2 possibilities: her locker number is  119  or 137.