You will find below some excellent exercises to expand your memory Brain training, focus and concentration are cumulative and worth the effort.
Just like the long-distance runner, or the aerobic dancer, much as they build lung capacity by stamina, you can do the same by concentration and focus, build a capacity to stick with it longer.
1] PICK 13
In the game you must keep a number
in mind as you progress through the
diagram and perform mathematical
operations on the square in the boxes
[ For Example: if you choose to start
with the 13 in the upper left corner you
can go two ways, either by moving right,
(multiply 13 x 3), or going down, (13 x 7)].
Your goal is to go from 13 to 181 in 10
You can go in either direction, horizontally
and vertically ( but not diagonally).
You may start in either upper corner, however ,
and this is the trick, only one starting point is correct.
2] Memory shapes
Below are 2 pictures that are similar, Diagram1 and Diagram2.Study the diagrams together for several minutes.
Then looking at only Diagram1 see if you can remember all the differences between the two diagrams.