This is often given as an example of an easy question, such as "What color is my red car?" or "When was the War of 1812?" Groucho Marx asked this question of some contestants on his quiz show, You Bet Your Life.
Some insist, because Grant's body is above the ground, that even Grant is not buried in Grant's tomb.
Grant's Tomb was once one of the most visited places in New York City, but no more. It was completed in 1897 and remains the largest mausoleum in North America.
16 April 1930, Coshocton (IL) Tribune, April 16, 1930, pg. 2, col. 2:
Jim Talmadge - Who was buried in Grant's tomb?
"Doc" Wright - Dunno, but wasn't it the same guy that was president during Grant's administration?
3 July 1953, New York Herald Tribune, pg. 14, col. 1:
According to a rough count, there are now about twenty hours of quiz shows on network television. Of course, that's extending the quiz category pretty broadly. It includes, for instance, Groucho Marx blandly asking a studio contestant if he knows who is buried in Grant's Tomb.

