There are a lot of 7s in this picture, but there are also a few Zs. Can you find the Z in this picture and how many Zs are there in the picture in 10 seconds?

To find out how many Zs there are, you need to carefully observe each horizontal and vertical row. Many people thought this challenge would only take 5 seconds to complete, but many people gave up because looking at the picture made them dizzy and did not have enough patience to continue searching.

If you can figure out where the letter Z is and how many there are in 10 seconds, you must be really sharp-eyed.

If you can solve this puzzle, quickly register yourself in the top of the smartest, most observant people by leaving the answer in the comment box below.