Logic Circuit Design
Hint #1: Break the problem down into chunks. You have a system with two inputs (a measurement and a value to compare it with) and an output (a single bit). You know that you must compare the measurement and the value, and spit out a single bit indicating if the values are equal. So, at least you know that you need some comparison logic. You should also assume that your reference value is 8 bits since it's not explicitly specified - why complicate things?

Hint #2: Think about how to implement these chunks with hardware. For example, what does 'equal' actually mean? It means that all 8 bits of the measurement must match all 8 bits of the reference value. So, your next task is to figure out how to check those bits one by one, then figure out how to check the results of those checks to see if they all match, which (if you're clever) will be your single output bit.