Question

Julie says I added three odd numbers and my answer was 50 explain why Julie cannot be correct

Answer 1

Julie cannot be right. That's because if you add three odd numbers together, you always get an odd number. The number 50 is an Even number.

Let's try adding 3 odd numbers together a couple of times...
3 + 3 + 3 = 9 
5 + 1 + 5 = 11 
7 + 3 + 5 = 15 
We tried 3 examples, we could not get any even number. So, Julie's claim is wrong. 

Answer 2

Because fifty does no go evetnly into 3 odd numbers