Brain Test Level 121: What should we put in place of the question mark?
Brain Test Level 121
Screenshots

Quick Answer
The grid represents a manual car gear stick layout. Type 'R' for reverse and tap the checkmark.
Skills Tested
Step-by-Step Solution
- 1) Look at the grid and recognize it as a manual car gear layout.
- 2) Notice where the question mark sits compared with the other gear letters.
- 3) Type R, for reverse, in the question mark slot.
- 4) Tap the checkmark to confirm your answer and clear the level.
Hint
Reveal a hint
Read the grid as a manual car gearstick pattern and pick the letter for the empty gear slot.
Why It Works
The arrangement of letters matches the gearshift diagram found in a manual car, with R for reverse sitting on its usual side. Putting R in the empty slot makes the layout match the real gear pattern, so the checkmark completes it.
Frequently asked questions
How do I solve Brain Test level 121?
Recognize the grid as a manual car gear layout, type R for reverse in the question mark slot, and tap the checkmark.
What is the answer to Brain Test level 121?
The missing symbol is R for reverse, so type R and tap the checkmark to complete the gear pattern.
What do the letters mean in Brain Test level 121?
The letters are the gear positions of a manual car, with R for reverse, and the empty slot should hold R as well.
What is the trick in Brain Test level 121?
The trap is treating it as a math or letter puzzle, when it is actually the gearstick layout of a manual car.
Why is the answer R in Brain Test level 121?
Because R stands for reverse, and it belongs in the empty top-left gear position to match a standard manual gearbox diagram.
Is there a video walkthrough for Brain Test level 121?
Yes, the embedded video on this page shows typing R and pressing the checkmark for Brain Test level 121.
What should I do after typing the letter in Brain Test level 121?
After entering R, tap the checkmark to confirm, which finishes the gear layout and completes the level.