Daniel Tammet is autistic and he has savant it is something where you are really good at one or two thing and not so good at other things. Daniel Tammet it really good math and remembering things, the reporter asked him some math questions like 17 x 17 x 17 x 17  and he gave him the correct answer in less then 10s. What he also did was name all 23 thousand numbers after the decimal point of pi.