To add to the previous comment.
If numbers are sequential as in your example, you can use "System -> Is between values -> floor(random(100)) between 1 and 5"
There are also a few workarounds to optimize it. For example, you can do this:
Compare two values-> find ("#1#2#3#9#15#" , "#" & floor(random(100)) & "#") >= 0
Or install the SwitchCase plugin:
It's a really useful plugin and I'm using it a lot in my game.