Brain Test 4 Level 418: Worry must turn on the machine safely.
Brain Test 4 Level 418
Screenshots

Quick Answer
Solve the Sudoku-style puzzle on the screen by dragging the shapes (Square, Triangle, Circle, X) from the bottom tray into the grid so that each row and column contains exactly one of each shape.
Skills Tested
Step-by-Step Solution
- 1) Look at the four symbols lined up in the lower tray.
- 2) Slide Square, Triangle, Circle, and X into the board.
- 3) Ensure no row repeats any one shape.
- 4) Check every column too, and the machine starts up.
Hint
Reveal a hint
Each row and each column needs one of every shape.
Why It Works
A Sudoku-style rule lies behind the screen, so repeating any shape in a row or column is not allowed. Placing Square, Triangle, Circle, and X once in every line and column solves the grid, which safely turns the machine on.
Frequently asked questions
How do I turn on the machine in Brain Test 4 Level 418?
Complete the Sudoku-style grid by dragging Square, Triangle, Circle, and X so every row and column holds one of each shape.
What is the answer to Brain Test 4 Level 418?
Fill the grid from the bottom tray so each row and each column contains exactly one of every shape, then the machine powers on.
What is the trick in Brain Test 4 Level 418?
The screen shows a logic puzzle, so you must place the four shapes so no row or column repeats one.
Why do I need to solve the grid in Brain Test 4 Level 418?
The machine is locked behind the Sudoku-style board, and completing it correctly is how the device turns on safely.
Is there a video walkthrough for Brain Test 4 Level 418?
Yes, the video shows dragging the four shapes into the grid so each row and column has one of each to start the machine.
How do I avoid getting stuck in Brain Test 4 Level 418?
Place the symbols so each row and column holds all four shapes just once; repeating a shape in a line will block the machine.