How to Insert Arithmetic Means What is an arithmetic mean? Arithmetic mean(s) is (are) term(s) between any two numbers such that the resulting sequence will form an arithmetic sequence. Examples 1. Find the arithmetic mean between 7 and 37. Answer 22 2. Find two arithmetic means between -4 and 5. Answer -1, 2 3. Insert four arithmetic means between 7 and 27. Answer 11, 15, 19, 23