Only 1% can spot the hidden odd number in this ‘421’ numerical optical illusion. Test your observation, IQ, and Hawk–Eye vision in this fun brain teaser.

This optical illusion IQ test challenges your observation skills by asking you to find the odd number hidden among 45s within just 5 seconds. Only 2% of people with sharp vision can solve this tricky ...

The odd-even scheme will replace the number coding scheme on EDSA when its rebuilding starts in June, the MMDA clarified Tuesday.

The 24-hour odd-even scheme will temporarily replace the regular number coding along EDSA as the thoroughfare undergoes rehabilitation.

Because of its unique place on the number line, people can sometimes get confused about whether zero is an odd or an even number.

Challenge yourself with a number puzzle where an odd number lurks among '2222.' The key to solving lies in relaxing your gaze, breaking the image into ...

Look at this optical puzzle closely, it is designed to test your visual acuity. Observe this image carefully and find out the odd number present in the image. You only get 7 seconds to find the odd ...

Your task is to find the odd number. But wait! You have only 9 seconds to finish this challenge. Ready? Start observing the image carefully. Scan the grid methodically, with the clock ticking away.

Odd and Even in betting means a bettor predicts whether the total number of a particular match statistic will be an odd or even number. Learn more.

Where some even numbers feel boring and run-of-the-mill, odd numbers can feel slippery, uneasy, and exciting. When we flip the volume to 42 rather than 43 we feel comforted, safe.