Solving Aid is a term used to describe tools that can help people solve problems. The most common of these are CLUE, HINT, and PENCIL. CLUE is a four-letter word that refers to a piece of information that can help someone figure out the answer to a question or puzzle. HINT is also a four-letter word that provides a subtle suggestion or indication about how to solve a problem. PENCIL is a six-letter word that refers to a writing instrument used to make marks on paper. All three of these tools can be used to help people solve problems more quickly and efficiently.