Brain Test Level 134: I had 10 fish in my aquarium, and I came home to see that 6 of them died. How many are left in the aquarium?
Brain Test Level 134
Screenshots

Quick Answer
Enter '10' because the dead fish remain in the tank, then tap the checkmark.
Skills Tested
Step-by-Step Solution
- 1) Read the question carefully and notice that it asks how many fish remain in the aquarium.
- 2) Keep in mind that the six dead fish are still physically inside the tank.
- 3) Count every fish still present, whether it is dead or alive.
- 4) Enter the number 10 and tap the checkmark to complete the level.
Hint
Reveal a hint
Ask yourself what the word "left" really means: are the dead fish still in the tank?
Why It Works
The trap is the wording, not the math. Even though six fish died, none of them left the aquarium, so the number still left in the tank is the original ten. Entering 10 and confirming it is the intended solution.
Frequently asked questions
How do I solve Brain Test level 134?
Enter the number 10 because the dead fish remain in the tank, so all ten fish are still left in the aquarium.
What is the answer to Brain Test level 134?
Type 10 and tap the checkmark, since the six dead fish never leave the aquarium.
Why is the answer not 4 in Brain Test level 134?
Although six fish died, the question asks how many are left in the aquarium, and dying does not remove a fish from the tank.
What is the trick in Brain Test level 134?
The trap is the word "left", which means remaining in the aquarium rather than alive, so the dead fish still count.
How many fish are left in the tank in Brain Test level 134?
All ten fish are left because the six that died are still inside the aquarium, giving the total of 10.
Is there a video walkthrough for Brain Test level 134?
Yes, the embedded video on this page shows you entering the number 10 and tapping the checkmark to finish the level.
Does Brain Test level 134 really count dead fish as left?
Yes, because the question is about how many fish remain in the aquarium, and the dead ones do stay in the tank.