Brain Test 4 Level 91: I can't break this walnut's shell!
Brain Test 4 Level 91
Screenshots

Quick Answer
Tilt the rocking chair back, place a walnut under its leg, and release it to crush the shell.
Skills Tested
Step-by-Step Solution
- 1) Tilt the rocking chair backward.
- 2) Place the walnut under the chair leg.
- 3) Let go so the chair rocks down.
- 4) Watch it crush the walnut shell.
Hint
Reveal a hint
Use the weight of a chair to crack the hard shell.
Why It Works
Since brute force with your hands fails, you turn a chair into a tool. Lowering the tilted chair onto the walnut applies enough pressure to crack it.
Frequently asked questions
How do I solve Brain Test 4 Level 91?
Tilt the rocking chair back, place the walnut under its leg, and release the chair to crush the shell.
What is the answer to Brain Test 4 Level 91?
The answer is to tilt the rocking chair, set the walnut beneath its leg, and release it so the chair cracks the shell.
What is the trick in Brain Test 4 Level 91?
The trick is using the rocking chair weight as a cracker instead of breaking the walnut by hand.
Why do I need to use the rocking chair in Brain Test 4 Level 91?
The rocking chair provides enough downward force to crush the walnut shell when it rocks down onto the nut.
Is there a video walkthrough for Brain Test 4 Level 91?
Yes. The embedded video shows the chair being tilted, the walnut placed under its leg, and the chair released to crack it.
How do I avoid getting stuck in Brain Test 4 Level 91?
Do not try to break it by hand. Tilt the rocking chair, put the walnut under its leg, and let it drop to crack it.