"10-20" is a numerical range that typically refers to a set of values between 10 and 20. This range can be used in various contexts, such as counting, scoring, or measuring. It is often seen in educational settings, where students might be asked to identify numbers or perform calculations within this range. In some cases, "10-20" can also refer to a specific code or shorthand in communication. For example, in CB radio lingo, "10-20" means "location" or "where are you?" This usage highlights how numbers can convey different meanings depending on the context in which they are used.