Brain Test 4 answer

Brain Test 4 Level 30

Puzzle prompt

We need a cleaner energy for this robot

Direct answer

Tap on the faucet to turn it on. Then, drag the dirty battery to the sink to wash it. Now, drag the clean battery to the robot.

Puzzle screenshot

walkthrough

Follow the screen sequence

Use the images as a compact replay of the solving path. The text below each frame explains what should change.

Video walkthrough

version check

Same number in other versions

Brain Test versions can reuse the same level number with a different puzzle. If the screenshot or question does not match your game, switch to the same number in another version or use the nearby level links.

Brain Test 1Level 30 Brain Test 3Level 30 Brain Test 4Level 30 All StarLevel 30

Strategy guide

1.First tap the faucet to activate water flow before attempting any battery cleaning;
2.Drag the dirty battery to the sink area after turning on the faucet to wash it clean;
3.Only place the now-clean battery into the robot after completing the washing process.

Common mistakes

1.Trying to drag the dirty battery directly to the robot without cleaning it first;
2.Tapping the faucet but forgetting to drag the battery to the sink for washing;
3.Attempting to use other objects like the light bulb or plant instead of the faucet and sink.