Memory Puzzles to Keep You Sharp (Test Your Recall with 80 Photo Games). Boost your memory, improve your attention to detail, and have fun with these 80 puzzle games! We all want to stay sharp-and these puzzles will give you a memory-strengthening workout. First, study the picture. Then, flip the page and answer the questions about what you saw in the previous image. How many did you get right? Fortunately, the more puzzles you try to solve, the better you're likely to do! By: Luke Sharpe. Pages: 176. Paperback Format. Publisher: Puzzlewright (October 2, 2018. )Language: English. Dimensions: 8" x 9".