Brain Test All-Star Level 138: Fix this equation.
Brain Test All-Star Level 138
Screenshots

Quick Answer
Tap the cannon three times to shoot cannonballs at the equation, changing it to 20 x 2 = 20 + 20.
Skills Tested
Step-by-Step Solution
- 1) Aim the cannon at the equation.
- 2) Tap the cannon once to fire.
- 3) Tap twice more to fire three shots total.
- 4) Check the equation now reads 20 x 2 = 20 + 20.
Hint
Reveal a hint
Shoot the cannon at the equation three times to change it.
Why It Works
This is a destructive-math puzzle: the equation gets fixed by being bombarded. Three cannon blasts reshape it into a correct statement.
Frequently asked questions
How do I solve Brain Test All-Star Level 138?
Tap the cannon three times to shoot cannonballs at the equation, changing it to 20 x 2 = 20 + 20.
What is the answer to Brain Test All-Star Level 138?
Fire the cannon three times so the equation becomes 20 x 2 = 20 + 20.
Why do I need the cannon in Brain Test All-Star Level 138?
The cannon blasts alter the equation into a correct one after three shots.
What is the trick in Brain Test All-Star Level 138?
You fix the math by shooting it, not by rewriting the numbers by hand.
Is there a video walkthrough for Brain Test All-Star Level 138?
Yes. The embedded video shows firing the cannon three times at the equation.
How do I avoid getting stuck in Brain Test All-Star Level 138?
Keep tapping the cannon until you have fired exactly three shots.