Can You Guess The Mystery Sound? Fitness Trivia Brain Break Challenge. A brain teaser quiz everyone can enjoy! Directions: Decide which logo is correct. Look at the logos and select the correct sound by performing one of the three listed answer choice exercises for 25 seconds! The correct answer will be revealed after the 25 second exercise following a 10 second rest with a new sound. You will receive one point for each round that you get correct. There are 8 total rounds.