But this clever brain teaser will test your IQ, all you have to do is find the hidden object before the clock runs out. Be warned, it's not as easy as it sounds though since you only have 30 ...

But beware: the puzzle is more difficult than it looks, as one in three participants can only find four of the five ... while the fourth is hidden below the front leg of the armchair.

Illumination: Shining a flashlight or specialized vein-finding devices on hidden veins can make them appear on the surface of the skin. For patients with hard-to-find veins, preparation and timing ...

Now, check again and see if you can find it. The clock is ticking. Hurry up. The last few seconds remain... The hidden cat can be seen on the right side of the picture, it is difficult to spot at ...

In this brain teaser, you need to find the hidden elf in 5 seconds. The hidden elf puzzle is difficult because the background hides it perfectly. So, do you have the true skills of a puzzle master?

There he is, hiding on top of one of the stall's roofs. Can you find the hidden Santa hat in under 35 seconds? The Santa hat was hiding on a flower the entire time.