The challenge lies not just in counting the most obvious "3s" but in meticulously examining the entire interface for every occurrence. It’s a test of both observation and analytical skills ...

Skip counting is a useful skill if you need to count sets of objects, such as pairs of shoes, gloves, the wheels on a tricycle, or even money. Counting on in twos, threes, fives and tens is easy ...

Zoom in to spot faint or subtly placed number 3s. Divide the image into sections and count section by section. Look out for upside-down, mirrored, or camouflaged representations of the number 3.