###Human: The half-hour newscast includes 12 minutes of national news, 5 minutes of international news, 5 minutes of sports, and 2 minutes of weather forecasts. The rest is advertisements. How many minutes of advertising are in the newscast?, ### Assistant: 12+5+5+2=24 minutes are accounted for.
There are 30-24=6 minutes of ads. 
 So the answer is :  6