In a freezer, a temperature of -23°C (-9°F) is colder than -15°C (5°F). The lower the temperature, the colder it is.
In a refrigerator, the coldest temperature setting is typically represented by a higher number. The numbers 1, 2, 3, 5, and 7 are often used to indicate the temperature settings on a refrigerator's control dial or display. Among these options, 1 is usually the warmest setting, while 7 is the coldest setting. It's important to consult the specific refrigerator's manual or labeling to determine the exact temperature range associated with each number setting, as it may vary between models.