This list of 25 6-digit numbers is a great way to help improve short term memory. Since most people can remember 7 items plus or minus 2, then this number search puzzle makes for a great support to help improve short term memory.
To achieve this, review the numbers in the list. Choose one number and then repeat the sequence of the digits, either in your head or aloud. Then, locate that 6-digit number in the grid. The brain needs to retain that 6-digit sequence, in short term memory, while simultaneously trying to locate that number in the grid.
Repeat the process until all the puzzle is solved. Choose between the PDF and Google Apps formats to complete this brain teaser.