births
Jacques Inaudi, Italian calculating prodigy (died 1950)
Related Wikipedia articles
Jacques Inaudi
Italian calculating prodigy
Giacomo Inaudi, also known as Jacques Inaudi in France, was an Italian calculating prodigy.Source: Wikipedia (CC BY-SA)
Mental calculation
Arithmetical calculations using only the human brain
Mental calculation consists of arithmetical calculations made by the mind, within the brain, with no help from any supplies or devices such as a calculator. People may use mental calculation when computing tools are not available, when it is faster than other means of…Source: Wikipedia (CC BY-SA)
October 13
Day of the year
October 13 is the 286th day of the year in the Gregorian calendar; 79 days remain until the end of the year.Source: Wikipedia (CC BY-SA)