Open in the curiosity app
Can You Solve Cheryl's Birthday Problem?

Can You Solve Cheryl's Birthday Problem?

Cheryl's birthday problem is a logic puzzle that requires no math. Here is the problem: Cheryl wants Albert and Bernard to guess her birthday, and gives these possible dates: May 15, May 16, May 19, June 17, June 18, July 14, July 16, August 14, August 15, August 17. Albert knows the correct month, and Bernard knows the correct day. Albert says, "I don't know Cheryl's birthday, and I know Bernard doesn't know." Bernard says, "I didn't know at first, but I now know Cheryl's birthday." Albert says, "Now I also know!" When is Cheryl's birthday?

Advertisement
Advertisement

Share the knowledge!
play_circle_filled replay

Key Facts In This Video

  1. Here is the Cheryl's birthday logic puzzle: 00:27

  2. Here is how to solve to Cheryl's birthday logic puzzle: 02:50

  3. Here is the answer to Cheryl's birthday logic puzzle: 10:56

Advertisement
Advertisement

A more curious you.

Join millions of lifelong learners