What 3 numbers come next in the sequence of 0 2 4 7 10 13 15 18 20?

The pattern isn't strictly additive. Let's look at the differences between consecutive numbers:

* 2 - 0 = 2

* 4 - 2 = 2

* 7 - 4 = 3

* 10 - 7 = 3

* 13 - 10 = 3

* 15 - 13 = 2

* 18 - 15 = 3

* 20 - 18 = 2

The differences alternate between 2 and 3. Following this pattern:

* 20 + 3 = 23

* 23 + 2 = 25

* 25 + 3 = 28

Therefore, the next three numbers are 23, 25, 28.