A computational problem is like a puzzle. You are given a set of instructions, and you have to use them to figure out the answer to a question. An example might be a math problem like "What is 3 + 5?". To solve the problem, you have to use the instructions in the problem (which are to add 3 and 5) to figure out the answer (which is 8). Computers are really good at solving computational problems because they can follow instructions very quickly and accurately.