The landlord should be asking: A bottle of beer, 2 yuan, 1 bottle with four caps, a bottle with two empty bottles, 10 yuan, how many bottles can you drink?

Correct answer: 10 yuan can drink 20 bottles. There are two calculation methods:

The first type: 2 yuan 1 bottle of wine, 4 bottle caps are 1 bottle, and 2 bottles are one bottle. The calculation is as follows: 1 bottle cap 0.5 yuan, 1 bottle 1 yuan, 1 bottle of purified beer = 2-0.5.

The second type: 10 yuan bought 5 bottles of beer and borrowed 15 bottles of wine, so Party A drank 20 bottles of beer. Replace 20 empty bottles with 10 beer, 20 bottle caps with 5 beer, and 1 bottle with 15 beer. Ok, * * * number of drinking bottles =5+ 15=20 bottles of wine.