Ring a bell
This idiom is used to indicate that something sounds familiar.
Let’s say you cheated in an exam and you are grounded by the school administration but you decided not to tell your parents. When you came from school and found your parents waiting for you in the kitchen, looking at you angrily. When they asked you whether you wanted to tell them something or not, you said no. They also asked whether something had happened at school. When you say no again, your father said: “Math exam? Looking at one of your friend’s paper? Does it ring a bell?”