Exercise is important for every muscle in the human body – and that includes the brain.
Brainteasers and puzzles such as Sudoku and word searches can help keep the mind active and some experts believe they can help reduce the risk of dementia and help to keep the mind sharp.
As such, we’ve got the above puzzle for you, which has left some people scratching their heads.
Published by FreshersLive, the puzzle challenges people to find the odd number out in what at first glance looks like just rows of the number 444.
However a closer inspection shows that there is in fact a different number hidden in the image.
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People who can spot the odd number out in fewer than 13 seconds are said to have perfect vision.
Even if you don’t manage that time, tackling the puzzle is good for the mind and these challenges become easier with practice.
It’s vital to keep our minds sharp throughout our lives and this only becomes even more important as we age.
The healthier our brains are then the less likely we are to face certain conditions as we get older.
It is thought you can help reduce your risk of developing a degenerative neurological condition by keeping your mind stimulated and living a balanced lifestyle with fruits and vegetables.
So set a timer and good luck!