Here are 25 ready to go math puzzles with answers. I like to have one projected on my board at the start of math class and let the students debate their answers. This gets the students engaged in math before the class even begins. These puzzles require students know order of operations and are ready to do a little beginning algebra, perfect for a pre-algebra or algebra I class. I will also sometimes put one on a homework, quiz, or test as a bonus question. They can be used year after year.