Brain Test 4 Level 180
Doctor Worry must find a way to power up that machine
1) Connect the same letters with those sticks. 2) Change that X into a Y. 3) Drag the Y onto X to change it.

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
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.
Strategy guide
- 1.First, use the sticks to connect only matching letter pairs (A-A, B-B, etc.) to establish initial power flow;
- 2.Notice the X on screen and change it to a Y by tapping or interacting with it as indicated;
- 3.Finally, drag the newly created Y onto the remaining X spot to complete the circuit and power the machine.
Common mistakes
- 1.Trying to connect different letters instead of matching identical ones with the sticks;
- 2.Overlooking the need to transform the X into a Y before using it in the connection;
- 3.Attempting to drag the X directly onto the machine without first converting it to a Y.
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