#5. Five quick brain teasers for teens and adults to flex two key mental muscles: Attention and Working Memory (opens in new tab)

. Look­ing for some fun, and free, cog­ni­tive stimulation? Here you have a few quick brain teasers to exer­cise your atten­tion and your work­ing mem­ory–the abil­ity to keep infor­ma­tion in your mind while manip­u­lat­ing mul­ti­ple units of infor­ma­tion at the same time. Giv­en them a try … they are not as easy as they may seem :-) 1.…