Not only is 3 the first, but also the only one.
As it is drawn, 3 will just spill over after it's full.
I don't think any cup with a pipe coming out can fill first; I think 4 fills first
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Hehe that's the trick, the piepes on 3 are all closed 😎
Basically this is the image form of a trick question 😅
Oh that's dumb!
The actual answer is "none of the cups because it's not actual water!" then! 🤣
