Thomas Fuller, sometimes called “Negro Tom,” was an African man of remarkable intelligence. He was born in 1710 in West Africa, most likely in what is now Benin or Nigeria. At the age of 14, he was captured and sold into slavery. In 1724, he was brought to the American colonies and sold to a planter in Virginia. Although he lived his entire life enslaved and never learned to read or write, Fuller possessed an extraordinary gift for mental mathematics. Because of this rare talent, people later called him “the Virginia Calculator.”
Over the years, stories about Fuller’s abilities spread widely. Visitors who heard about him would come just to test his skills by giving him difficult arithmetic problems—problems that most educated people needed paper, pencil, or even several minutes to solve. Fuller, however, could do complex calculations entirely in his head and often answered within seconds or minutes.
One of the most famous examples of his ability happened when someone asked him:
“How many seconds are in a year and a half?”
Fuller paused only a moment. After about two minutes, he replied:
“47,304,000.”
Those who checked his answer later found it to be correct.
On another occasion, someone tried to challenge him with an even more complicated question:
“If a man is 70 years, 17 days, and 12 hours old, how many seconds has he lived?”
Fuller thought for about a minute and a half and confidently answered:
“2,210,500,800.”
A man who had been calculating the same problem on paper said that Fuller was wrong and that the true number was much smaller. Fuller immediately replied:
“Stop, master—you forget the leap year.”
When the man recalculated the problem and included the extra days from leap years, he realized that Fuller’s answer was exactly right.
Stories like these amazed people. Even though he lived in bondage and had no formal education, Thomas Fuller showed the world what human intelligence can accomplish. His abilities were later used by abolitionists as evidence of the intellectual equality of enslaved Africans, arguing that slavery was not only cruel but based on false beliefs about intelligence.
Thomas Fuller died in 1790, but his legacy lives on as a powerful reminder of brilliance shining through even in the harshest conditions.
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