There are 12 bottles of drinks, 11 of which are of the same quality, and another one is heavier. How many times can we guarantee to find out the heavier one?

There are 12 bottles of drinks, 11 of which are of the same quality, and another one is heavier. How many times can we guarantee to find out the heavier one?

4 times, with pallet balance

There are 12 bottles of water, of which 11 are of the same quality, and another one is salt water, which is slightly heavier than other bottles. Now we use the balance to weigh it at least several times to ensure that we can find out the reason
A bottle of salt water?

At least three times
1. Divide it into three 4's and put two of them on the balance. If it's flat, it means that the brine is in the remaining 4 bottles. If it's uneven, it's in the heavy 4 bottles
2. Divide the 4 bottles into 2 2. Put them on the balance and you will know where the brine is
3. Finally, put these two bottles on the balance and weigh them