Brain Test 4 Level 324: Doctor Worry must fix the machine.
Brain Test 4 Level 324
Screenshots

Quick Answer
Drag the pizza from the man's tray into the empty gear slot, then tap the power switch to turn the machine on.
Skills Tested
Step-by-Step Solution
- 1) Look at the machine and find the empty gear slot.
- 2) Take the pizza off the man's tray.
- 3) Drop the pizza into the open slot.
- 4) Tap the power switch to turn the machine on.
Hint
Reveal a hint
Treat the pizza as a gear and fit it into the empty slot.
Why It Works
This puzzle expects you to repurpose an everyday object. The pizza acts as an improvised gear, and once it fills the gap the machine can power on with a flip of the switch.
Frequently asked questions
How do I solve Brain Test 4 Level 324?
Drag the pizza into the empty gear slot, then tap the power switch to turn the machine on.
What is the answer to Brain Test 4 Level 324?
Use the pizza as a replacement gear in the empty slot, then hit the power switch to start the device.
What is the trick in Brain Test 4 Level 324?
The trick is treating the pizza as a gear, since it fits the missing slot and lets the machine power up.
Why do I need the pizza in Brain Test 4 Level 324?
Because the pizza works as a gear that fills the empty slot, which the machine needs before it can run.
Is there a video walkthrough for Brain Test 4 Level 324?
Yes, the embedded video on this page shows the pizza being placed in the gear slot and the switch being hit.
How do I avoid getting stuck in Brain Test 4 Level 324?
Do not look for real tools; grab the pizza, fit it into the slot, and then tap the power switch.