Uh-oh, something is amiss here! Something – or somebody – is hiding in these images, staying just away from the sight, and only you can spot what it is.

Can you prove yourself a master detective and solve every single one of these puzzles? There will be hints for what to look for, and some zooming in may come in handy if you need to take a closer look and uncover what is hidden, but in the end, it's all up to you and your spotting abilities. It can be harder than it looks — good luck, detective!