Which Tank Fills First? The Tricky Water Pipe Puzzle

This classic-style logic puzzle challenges you to follow a complicated water pipe system. Three tanks are labeled A, B and C, and water is flowing through a network of pipes. The question is: Which tank will fill first?

Look at the Pipes

The most important rule in this puzzle is simple: water can only reach a tank if there is a continuous open path from the source. A pipe that appears connected may actually be blocked by a closed valve.

Tank A

Tank A has a pipe connected to the main system, but one section contains a blockage. Because the water cannot pass through the blocked section, Tank A will not fill first.

Tank B

Tank B has an apparently direct route, but another pipe section interrupts the flow. This is one of the visual traps designed to make the puzzle look easier than it actually is.

Tank C

Tank C has the clearest open route from the water source. Its connecting pipe remains open, allowing water to travel directly into the tank.

Answer: C

Tank C fills first. The key is to trace the water path from the source all the way to each tank. Don't assume that two pipes are connected simply because they appear close together.

This is a great example of why visual logic puzzles require patience. Following every pipe carefully can prevent you from choosing the wrong answer.

Final Answer

C is the correct answer because it has the unobstructed water route. Did you get it right? Share the puzzle with your friends and challenge them to solve it without looking at the answer.