What number should I enter in Level 225?

Set the three windows to 231 and submit it.

Why is the last digit still red?

That red result is intentional; the final trick changes the meaning of Wrong rather than the digit.

Drag the green Correct circle onto the red Wrong circle until they overlap.

Brain Test 4 level guide

hard 5 colors

Brain Test 4 Level 225 submits 231, then overlaps the green Correct marker with the red Wrong marker so the final red digit counts as correct.

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Use the first column's arrows until it displays 2.
Use the second column's arrows until it displays 3 and leave the third column at 1.
Tap SUBMIT so the 2 and 3 turn green while the 1 turns red.
Press and hold the large green circle beside Correct.
Drag it down onto the red circle beside Wrong and release when the markers overlap.
Watch the red 1 turn green and the large check confirm 231.

Colors in this level:

White, Green, Red, Gray, Black

Board notes 5 details

Layout: Green Correct and red Wrong circles form a legend above three arrow-controlled number windows and a SUBMIT button; the starting entry is 112.
Goal: Create the 231 feedback state, then merge the legend markers so its remaining wrong digit becomes correct.
Opening: Set the three windows to 231 and submit, preserving the green 2 and 3 even though the 1 remains red.
Danger Zone: No choice for the third window resolves the puzzle normally; continuing to cycle that digit misses the draggable feedback legend.
Mechanics: The panel first behaves like per-digit code feedback, then allows the green Correct circle to redefine the red Wrong state by overlapping it.

What number should I enter in Level 225?
Set the three windows to 231 and submit it.
Why is the last digit still red?
That red result is intentional; the final trick changes the meaning of Wrong rather than the digit.
How do I make 231 fully correct?
Drag the green Correct circle onto the red Wrong circle until they overlap.