Fly Swat Riddle

Riddle: You are sitting at a table eating lunch and there are ten flies on the table. With a quick swat, you are able to kill three flies. How many flies are left on the table?

Answer: You killed three flies which remain on the table. The others flew off when you swatted. Source: https://riddles.com/5579

You are sitting at a table eating lunch and there are ten flies on the table. With a quick swat, you are able to kill three flies. How many flies are left on the table? — Fly Swat Riddle by Anonymous Riddle