Fermat's Last Theorem

Andrew said that when he was ten he was looking in his public library and he found a book on math and he read it. After he was done reading it he said he understood it. He tried to solve it and he said it was a challenge and it was very hard. But he liked it and he thought that it was so cool. So he said he started working on it when he was 10. Do you believe that he understood it when he was 10? Why or why not. explain......