A teacher is explaining biology to her 4th-grade students. "Human beings are the only animals that stutter," she says. A little girl raises her hand. "I had a kitty cat who stuttered." The teacher, knowing how precious some of these stories...

How many b’s can you find? Apparently, it's not strange - the vast majority of people get it wrong if they try to finish in under 10 seconds, which is the time limit for this challenge! Now, let's see how it...