###Human: Chelsea has 24 kilos of sugar. She divides them into 4 bags equally. Then one of the bags gets torn and half of the sugar falls to the ground. How many kilos of sugar remain?, ### Assistant: Each bag has 24/4=6 kilos of sugar.
6/2=3 kilos of sugar falls to the ground.
24-3=21 kilos of sugar remains. 
 So the answer is :  21