How many cubes can you see in this picture?
This black and white brainteaser, which has had internet users scratching their heads, could show six or seven of the symmetrical shapes.
But the number you pick will depend on how your mind works.
Some people will see the cubes inverted and some won’t – and the way you see it will determine whether you count six or seven.
There is no right or wrong answer to the mind-bending illusion.