This eye-test puzzle hides a five-digit number beneath a pattern of diagonal black-and-white lines.
At first, the stripes may make the image appear almost empty. Try moving the picture farther away, slightly squinting, or looking at it from an angle. These tricks reduce the visual interference and make the pale digits easier to recognize.
Look carefully across the center of the circle before checking the result.
Answer: The hidden number is 18291


