This sounds like one of those “which glass fills first?” puzzles.
If the pipes to glasses 1, 2, 4, and 6 are blocked, they can’t receive any liquid at all—either the blockage is right at the start or somewhere along the pipe, but in any case, flow is cut off.
So effectively, you ignore those glasses completely and only consider the ones still connected (like 3, 5, 7, etc., depending on the diagram).
👉 The correct answer is:
- None of the blocked glasses (1, 2, 4, 6) will ever fill.
- The glass that fills first must be one with a fully open, unobstructed path from the source.
If you want a precise answer (like “Glass #3 fills first”), I’d need to see the exact diagram or know which pipes remain open—these puzzles often include sneaky partial blockages or misleading paths.
