13th root 13th root of a 100-digit number. All world records for mentally extracting a 13th root have been for numbers with an integer root. 13th root Extracting the 13th root of a number is a famous category for the mental calculation world records. The challenge consists of being given a large number (possibly over 100 digits) and asked to return the number that, when taken to the 13th power, equals the given number. For example, the 13th root of 8,192 is 2 and the 13th root of 96,889,010,407 is 7. Extracting the 13th root has certain properties. One is that the
Fourth Battle of the Isonzo Fourth Battle of the Isonzo The Fourth Battle of the Isonzo was fought between the armies of Kingdom of Italy and those of Austria-Hungary on the Italian Front in World War I, between November 10 and December 2, 1915. In contrast to the previous three Battles of the Isonzo (June, July and October), this offensive lasted a short amount of time, and is sometimes considered a continuation of the previous offensive. Most of the clash was concentrated in the direction of Gorizia and on the Kras Plateau, though the push was distributed on the whole Isonzo front. The Italian Second