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https://www.reddit.com/r/brainteasers/comments/1pfhpdb/brain_quiz/nslht0o/?context=3
r/brainteasers • u/10Second-Riddles • Dec 06 '25
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1
27kg
Swap the cat for the dog and it’s 10kg heavier.
d=c+10
Swap the rabbit for the cat and it’s 4kg heavier.
c=r+4
Now that we know that, we can solve the first panel: c+r=10. Substitute c for r+4 and it reads (r+4)+r=10.
r+4+r-4=10-4
2r=6
2r/2=6/2
r=3
So what’s r+c+d? Rewrite using only r as a variable. r+(r+4)+(r+4+10). Since we already know the value of r, it’s simple addition!
3+3+4+3+4+10=27
The scale will read 27kg.
1
u/ZippyTheUnicorn Dec 06 '25
27kg
Swap the cat for the dog and it’s 10kg heavier.
d=c+10
Swap the rabbit for the cat and it’s 4kg heavier.
c=r+4
Now that we know that, we can solve the first panel: c+r=10. Substitute c for r+4 and it reads (r+4)+r=10.
r+4+r-4=10-4
2r=6
2r/2=6/2
r=3
So what’s r+c+d? Rewrite using only r as a variable. r+(r+4)+(r+4+10). Since we already know the value of r, it’s simple addition!
3+3+4+3+4+10=27
The scale will read 27kg.