What is black and white and red all over?

The phrase "black and white and red all over" is a classic riddle that has been around for many years. It is typically posed as a question, with the answer being "a newspaper." The reason for this answer is that newspapers are traditionally printed in black and white, and when they are read and used, they are often physically handled and can become red from the ink rubbing off onto the reader's hands.

This riddle has been used in various forms over the years and has become a popular brainteaser or joke for children and adults alike. It showcases the use of puns, wordplay, and lateral thinking to come up with a clever and unexpected solution.