The fun test below is a great example of just that. It’s very simple, and it only takes a few moments to do. But it really activates your brain and makes you focus for a while.
Below is an image with lots of number 8’s in it. But there are several letter B’s hiding in the sea of numbers – the challenge is to find out how many!
Most people fail
This test is a way to exercise your brain-eye coordination. I think most people can solve this one if they have all day – but the thing is, you only have 10 seconds. The time limit causes most people to fail the challenge on their first try.
Can you find all of them.
Here is the answer: all B’s marked in red: