Zerah Colburn (mental calculator)
…Colburn (September 1, 1804 – March 2, 1839) was an American child prodigy of the 19th century who gained fame as a mental calculator. Colburn was born in Cabot, Vermont, in 1804. He was thought to be intellectually disabled until the age of six. However, after six weeks of schooling, his father overheard him…