Weighty Wine

How much does a bottle of wine weigh if it is 1 kilogram plus half its own weight?

2 kg.

If we let half of the bottle’s weight be “n”, then we get the following equation: n/2 + 1kg = n (the bottle’s weight).

Solve for n:
n/2 + 1 = n
1 = n/2
2 = n

Posted in Brain Teasers


2 Comments on "Weighty Wine"

Jude says
June 19, 2021 @ 00:16

I’ve seen others like this and I have to say that they all confound me. I’m a college graduate and still it alludes me. Why???

Sherlock says
March 22, 2022 @ 00:09

2kg is the only value for which the description holds true. Since it’s 1kg plus half its own weight, that 1kg must be the other half, meaning it weighs 2kg.

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