Question: what is the middle number between 50 and 25?
Answer: When you ask "What number is halfway between 25 and 50?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=25 and Y=50. Thus, the number halfway between 25 and 50 is 37.5. As you can see, the halfway number is 12.5 higher than 25 and 12.5 lower than 50.