The SAT Math writers like to freak out test-takers by throwing some random symbol at them that they have never seen before. For example, can you tell me what 7▼5 is? Well, that’s obviously…wait, wha-!?

The good news is that no one knows what that crazy symbol means—but the question will always give you all of the information that you need to know. For example, an actual SAT question might look like this: