I have 4 different single digit numbers. Only one of my numbers is even. The largest number is one more than the number of inches in one-half of a foot. The sum of my numbers is 17. What are my numbers

So we already know that one of the numbers, the largest, is 7. Now we just need to find the other 3. The other 3 numbers add up to 10. So, we can divide 10 by 2 to get 5. What odd and even numbers equal five? 2 and 3.

Your numbers are 2, 3, 5, and 7.