Which of the following numbers could be used to specify how many cups of flour should be used in a bread recipe

The following numbers could be used to specify how many cups of flour should be used in a bread recipe:

- 0.5
- 1/3
- 2.25
- 3

To specify how many cups of flour should be used in a bread recipe, you can use any positive real number. However, it is common to see measurements such as 1/2 cup, 1 cup, 2 cups, etc. So, any number that represents a reasonable amount of flour, such as 1/4 cup, 3/4 cup, or 1 1/2 cups, can be used as well. The specific amount will depend on the recipe and your desired outcome.