Problem - 4669
$\textbf{Great Pyramid}$
Joe visited the Great Pyramid of Egypt in $1995$. He was so impressed that he vowed to visit this wonder again with his children. In $1975$, Joe brought his son there and fulfilled his vow. How was this possible?
$\textbf{Answer}$
It was in $1996$ BC and $1975$ BC, respectively. (Note that the Great Pyramids was built around $2500$ BC. So, it is possible.)
$\textbf{Note}$
It is a brain teaser, not a physics test. Therefore, do not even think about time travel.