A new optical illusion challenge is testing the sharpness of vision and observation skills of viewers across the globe, and Australians can join in on this intriguing brain teaser. The challenge is simple yet compelling: locate the hidden number 75 within a sea of visually similar numbers, all within a strict time limit of 7 seconds. At first glance, the image appears to be filled with repetitive digits such as 72s, 74s, or bamboo-shaped 2s and 5s, making the task more complex than it initially seems.
How the Illusion Works

This optical illusion works by leveraging pattern repetition and visual similarity to trick the brain. The numbers surrounding the hidden 75 closely resemble each other in color, shape, and orientation, causing the brain to quickly group them and overlook the subtle differences. This means only those with keen eyesight and sharp attention to detail can spot the elusive 75 in time. The number is often cleverly camouflaged, blending seamlessly into the repetitive background, which increases the difficulty and makes the challenge entertaining and stimulating.
Why Take on This Challenge?
Besides being a fun test of vision, puzzles like these offer benefits beyond pure entertainment. Neuroscientific studies suggest that engaging regularly with brain teasers and optical illusions can improve focus and visual perception skills. It also helps exercise the brain’s pattern recognition abilities and may contribute to slowing cognitive decline with age. With just 7 seconds on the clock, participants will need to maintain rapid visual processing and keen concentration, which in itself is a healthy challenge for the mind.
Tips for Spotting the Number 75
If the number 75 isn’t immediately visible, changing the approach might help. Experts recommend scanning the image slowly, row by row, or slightly zooming out to change the perspective. Looking for unusual breaks in the repetitive pattern or focusing on clusters where digits might be slightly misaligned can provide clues. In some versions of the challenge, the number 75 is located towards the edge or bottom right of the image, so giving attention to these areas might increase the chances of success.
Optical Illusion Answer

This sharp-sighted challenge is perfect for a quick mental break and can be an engaging activity for friends and family. Australians interested in testing their eyesight and attention to detail can try the puzzle online and see if they belong to the small percentage able to spot the hidden 75 in the allotted time. Whether for fun or as a brain exercise, the optical illusion challenge offers an enjoyable way to keep the mind alert and entertained.