Here's a question to start off the week from David Kuhn of Bethesda, Md.:

Barack Obama's grandmother, Madelyn Dunham, died two days before the election. Has there ever been a president with a living grandparent?

No. Had Ms. Dunham lived through the inauguration, Obama would have been the first.

And here's a similar trivia fact, relatively speaking: Only three men who served as president had both parents alive when they were in the White House: Ulysses Grant, John Kennedy and George W. Bush.

On the other side of the grandparent coin, John Tyler, the nation's 10th president, had the most grandchildren: 44.

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