Brain Test 3 Level 9: How can I open that door?
Brain Test 3 Level 9
Screenshots

Quick Answer
Change all shapes on the door to triangles. Drag the box to find the lever handle, attach it to the slot on the right, and pull it to open the door.
Skills Tested
Step-by-Step Solution
- 1) Turn every shape on the door into a triangle.
- 2) Drag the box aside to reveal the lever handle.
- 3) Attach the handle to the slot on the right.
- 4) Pull the handle to open the door.
Hint
Reveal a hint
Fix the shapes into triangles first, then hunt behind the box for the handle you need.
Why It Works
A layered puzzle that mixes shape matching with a hidden-object grab. You correct the door pattern, then find and fit the missing handle to pull the door open.
Frequently asked questions
How do I solve Brain Test 3 Level 9?
Change all the shapes on the door to triangles, then drag the box to find the lever handle, put it in the right slot, and pull it.
What is the answer to Brain Test 3 Level 9?
Make every door shape a triangle, move the box to get the lever handle, fit it into the slot on the right, and pull to open the door.
What is the trick in Brain Test 3 Level 9?
The door needs two separate steps. Matching the triangles alone is not enough because the lever handle is hidden behind the box.
Why is the handle behind the box in Brain Test 3 Level 9?
The box hides the missing handle. Dragging it away exposes the part you need to attach to the slot and pull.
Is there a video walkthrough for Brain Test 3 Level 9?
Yes. The embedded video shows the shape changes and where the handle is hidden in Brain Test 3 Level 9.
How do I avoid getting stuck in Brain Test 3 Level 9?
Finish the triangle shapes first, then look behind the box for the handle. Attach it to the right slot before you pull.