Your grandfather works on the new york times crossword puzzle every day. he has been very good at solving the puzzle and nearly always does. his ability to remember the meaning of words has shown no decline as he has aged, and really shows very little decline for most older adults. what type of memory is this?

Your grandfather . he has been very good at solving the puzzle and nearly always does. The fact that your grandfather works on the New York Times crossword puzzle every day and is really good at it, means that his  ability to remember the meaning of words has shown no decline as he has aged is episodic type of memory.
The episodic memory includes experiences and specific events in time in a serial form, from which we can reconstruct the actual events.