# Logical Riddle: Which Tank Will be Full First III (6 Tank Both Versions)

I received 1 more of the “Which-tank-will-fill-first” riddles in 2 versions.

I am including both the versions in this riddle along with answers.

Looking at the picture below, **which tank will fill first?**

**Version 1**

**Answer:**

**Tank 2 will fill first in version 1**

**Tank 5 will fill first in version 2.**

In version 1 you will be tempted the think that 3 will be the first one but 3 will only start filling once the water starts to come into 4, which will happen only after 2 is full.

In version 2 since the connection between 5 & 2 are blocked, water will not flow beyond tank 5 so the fifth tank will fill first.