Brain Test 4 Level 49
I must answer Doctor Worry's question
1) Some parts of the board are covered. 2) Drag the curtain above to reveal what is x.

Follow the screen sequence
Use the images as a compact replay of the solving path. The text below each frame explains what should change.

Video walkthrough
Same number in other versions
Brain Test versions can reuse the same level number with a different puzzle. If the screenshot or question does not match your game, switch to the same number in another version or use the nearby level links.
Strategy guide
- 1.First, notice that parts of the equation are covered - this indicates you need to reveal something;
- 2.Drag the curtain at the top of the screen downward to uncover the complete equation;
- 3.Once the curtain reveals what 'x' equals, tap that number as your answer to Doctor Worry's question.
Common mistakes
- 1.Trying to solve the math problem directly without noticing the covered parts of the board;
- 2.Overlooking the curtain above the board that can be dragged to reveal hidden information;
- 3.Assuming the answer is a simple calculation without considering the visual trick involving the curtain.
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