4. Completion of familiar tasks
What’s normal: As we age, we may temporarily blank on elements of processes that we do only occasionally. It’s normal to space on how to change the oven clock at Daylight Savings time, or whether a straight beats three of a kind in poker.
The warning sign: Alzheimer’s is more likely if someone repeatedly forgets how to perform routine tasks, such as driving to work or navigating the grocery store. Other clues might be forgetting where extra toilet paper is stored or not remembering how to fold a shirt.