Can you solve this tricky puzzle Tim Peake had to take before going into space?
It involves moving a cube in your mind.
Tim Peake has been confusing the internet with a tricky brainteaser astronauts have to answer as part of the European Space Agency’s selection process.
The 45-year-old spaceman shared one of the puzzles from his new book Ask An Astronaut on his Facebook page.
It involves moving a cube in your mind by following the given instructions to work out the position of a dot at the end of the sequence.
Peake posted: “Here’s a weekend brain teaser, featured in my #AskAnAstronaut book, straight from my astronaut selection test… they get harder!!!”
On the surface it sounds simple enough, but it appears mentally moving a cube is harder than you think.
The puzzle has the astronaut’s 681,000 Facebook followers bamboozled, with one user saying the instructions were ambiguous while a few others were convinced it was a trick question.