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Barry is thinking of a number.
He says, "My number is even. It is a factor of 30 and a multiple of 5”.
There are two possible numbers Barry can be thinking of.
Write down these two numbers.

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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