Answer:
10 and 30 
Step-by-step explanation:
Let's focus on the first 2 parts of the hints :  
The number must be even and a factor of 30 : 
Let's write out the factors of 30 : 
1 , 2 , 3 , 5 , 6 , 10 , 15 , 30 
Now let's pick out the even ones : 
2 , 6 , 10 , 30 
Now let's take out the multiples of 5 : 
10 and 30 
These are the answers 
Hope this helped and have a good day