Article first published on New Idea.
This image shows four separate tanks with a tap dripping into the tank labelled ‘one’.
After looking at the confusing array of pipes and misaligned tanks, can you see which tank will fill up with water first?
Think it’s tank three? Think again.
The answer is… tank two!
The pipe between tank two and tank three is sealed off, meaning two will be the first to reach full capacity.