Your IQ is fixed, but I believe many people operate below their potential IQ. This might sound like a low-IQ statement, but hear me out. Engaging in activities like playing chess, solving puzzles, and coding can help you reach your full IQ potential. Personally, I've noticed that my thinking speed has improved since I started playing more Sudoku and chess. Before I started doing these activities (since I had nothing else to do in my free time except rotting and jerking off), I took an online IQ test and scored 103. After playing chess, doing more Sudoku, and solving puzzles, I took another IQ test, which I believe was the Mensa IQ test, and scored 115.