This guide is mapped to “Mouse + Cat = 10 Mouse = 4 Cat + Mouse + Mouse = ?” in the checked version. If Level 140 shows another question, use the text and screenshot rather than the number alone.
Answer and walkthrough
The question is “Mouse + Cat = 10 Mouse = 4 Cat + Mouse + Mouse = ?.” Its trick depends on how the wording, movable artwork, or screen controls behave. The concise answer appears first; reveal the three steps only if you need more detail.
Brain Test Level 140 quick answer: Solve the equations: mouse is 4, cat is 6. The cat is upside down in the final equation, turning 6 into 9. Enter 17 (9 + 4 + 4) to complete the level.
Step-by-step walkthrough
Read the trick
Look over the whole puzzle headed “Mouse + Cat = 10 Mouse = 4 Cat + Mouse + Mouse = ?.” The intended solution may use the prompt, level label, or movable artwork as part of the answer.
Important notes
- Enter only the verified value, then use the on-screen confirmation control when the puzzle provides one.
- Do not add extra actions after the verified answer; many Brain Test puzzles punish an otherwise sensible second move.
- Question order can change after an update, so match the wording and screenshot instead of trusting the number alone.
- Restarting the level restores moved objects and counters if an earlier experiment changed the puzzle state.
Why this answer works
Solve the equations: mouse is 4, cat is 6. The cat is upside down in the final equation, turning 6 into 9. Enter 17 (9 + 4 + 4) to complete the level. The puzzle rewards attention to the exact wording and to objects that can be moved or tapped, not a complicated calculation.
Useful solving habits
- 1Read the prompt literally before applying real-world assumptions.
- 2Test whether text, labels, and decorative objects are interactive.
- 3Use the simplest gesture that matches the verified answer.
- 4Compare the success frame with the screenshot if the result is unclear.
Collectibles and completion
There are no optional collectibles required to finish this puzzle; completing the verified action is enough.
Level 140: Solve the equations: mouse is 4, cat is 6. The cat is upside down in the final equation, turning 6 into 9. Enter 17 (9 + 4 + 4) to complete the level.
What the dedicated video shows
This short clip shows the exact question “Mouse + Cat = 10 Mouse = 4 Cat + Mouse + Mouse = ?,” the required interaction, and the green completion confirmation. It is embedded through YouTube's privacy-enhanced domain and loads only after you press the button.
What to watch closely
Solve the equations: mouse is 4, cat is 6. The cat is upside down in the final equation, turning 6 into 9. Enter 17 (9 + 4 + 4) to complete the level. Watch the pointer or finger position rather than only the final screen, because the important clue is often which object moves or which word receives the tap.
Quick feedback
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