Oct 10, 2006
By: Alvaro Fernandez
Quick! Count the number of times the number “6” appears below (you may need to scroll down).
Then, count the total of both “3“s and “7“s, trying to add the total number of both as you see either (this is, don’t just count all the “3“s, and then the “7“s)
1234467889974674657865876576576 3576573625432657346578436578342 2732188582735827456724687343828 7672878682768723682376783768267 2647648823178346432764876774653 7436574386581483627868653873465
The most important thing here is not to get the right answer, but to try. This type of exercise has been used by the military to improve attention for decades (now there are more advanced, computer-based, tools, but this keeps being fun).
PS: Enjoy these 50 brain teasers to test your cognitive ability. Free, and fun for adults of any age!