In the first week, Paul used 24 cups of sugar.
In the second week, he used half the amount of sugar, so 24/2 = 12 cups of sugar.
In the third week, he used half the amount of sugar again, so 12/2 = 6 cups of sugar.
In the fourth week, he used half the amount of sugar once more, so 6/2 = 3 cups of sugar.
Therefore, Paul used 3 cups of sugar for the cake on the fourth week.
#### 3
The answer is: 3
Below is a math problem. Provide a detailed, step-by-step solution.

### Problem:
If Paul followed a cake recipe that required 24 cups of sugar in the first week and reduced the amount of sugar by half each subsequent week, how much sugar did he use for the cake on the fourth week?

### Answer:
