Not many people will be able to solve this brainteaser from the Australian game show the 1 Percent Club. Only 15 percent of people are able to come up with an answer to this seriously puzzling question, which has left a lot of people completely stumped.

Brainteasers, riddles, and other mental challenges like puzzles come with so many benefits. Not only do they give you a mood-improving boost of dopamine when you solve them, but they can also help improve your attention to detail, critical thinking skills, and memory. A study has also shown that undertaking daily puzzles can even help keep some impacts of aging at bay - so it is well worth incorporating some kind of puzzle or challenge into your daily routine.