Which Glass Fills First? The Viral Puzzle That’s Trickier Than It Looks

At first glance, it seems simple: five wine glasses, one water source, and a network of pipes connecting them. The question? “Which glass fills first?” But as many have discovered, this viral puzzle isn’t as straightforward as it seems.

Let’s break it down together—and reveal why Glass #3 is the surprising (and correct) answer.

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The Setup

In the image, water drips from a tap at the top and flows through a maze of interconnected pipes, leading to five numbered glasses. Your task is to determine which of these glasses fills up first. The challenge lies in understanding the path the water can actually take—and which pipes are blocked.

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How to Solve It: The Step-by-Step Analysis

To get to the answer, we need to trace each pathway carefully, keeping in mind one crucial rule:
Some pipes are blocked or closed off, preventing water from reaching certain glasses.

Let’s examine the connections:

• Glass 1: Although it’s the leftmost glass, the pipe leading to it is blocked, so no water can flow in.
• Glass 2: The path also seems promising at first glance, but it too is blocked farther down the line.
• Glass 4 and Glass 5: Both are cleverly designed to mislead you—each has either a blocked pipe or no accessible connection until others fill first.

Now for Glass 3:

This glass is the only one with a clear, unblocked path from the tap. The water flows straight down and directly into it. No diversions, no blockages, no tricks.

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The Answer: Glass 3 Fills First

Despite the apparent complexity, once you remove the distractions of blocked paths and false leads, Glass 3 emerges as the clear winner. It receives water first because it’s the only one with an open, unobstructed flow from the source.

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Why Puzzles Like This Are So Popular

This image is a classic example of a visual logic puzzle designed to test more than just your eyesight—it tests your observation, reasoning, and attention to detail. It’s gone viral multiple times on social media, often sparking debates, comments, and second-guessing.

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Final Thoughts

Next time you come across one of these “Which fills first?” puzzles, take a moment to trace every pipe and connection. The most obvious answer is often wrong—and that’s exactly what makes it fun.

So, did you guess correctly? If not, don’t worry—these puzzles are meant to challenge even the sharpest minds.

Answer: Glass #3 fills first.

Spread the fun—share it and see who gets it right!