You have the eyes of a hawk if you can spot the odd number in this sequence in less than seven seconds

THIS mind-bending optical illusion will put your eyes to the test.

The puzzle asks you to find the odd number in this sequence, and if you can do it in under seven seconds you have the eyes of a hawk.

This new optical illusion shows an image of the number 775 printed over and over again - but there's an odd one out.

Number 725 appears somewhere along the number sequence - and the test is simple, can you spot it?

While the test is relatively straightforward, it's not as easy to spot the missing number.

And it's even harder to try and spot it in the seven-second timeframe.

If you're finding it hard then don't worry, we recommend scanning each individual line.

Still need a hint?

Keep your eyes focused on the middle number of the three-digit sequence.

And if it's still too hard, focus on looking at the digits near the bottom right-hand corner of the puzzle.

If you've given up, then you can scroll down to see the odd sequence circled.

For those who enjoyed this challenge, why not test your vision and see if you can spot the wild animal hiding in this box of stuffies?

Or find out if you have a high IQ and see if you can find the paintbrush concealed in this sketch of a sleeping cheetah.

And this optical illusion challenges you to spot the correctly spelt word in less than ten seconds.

Others may prefer trying and detect the rabbit hidden inside this picture in less than five seconds.