The Magic of the Number Eleven!
Eleven derives from the Old English ęndleofon, first attested in Bede's late 9th-century “Ecclesiastical History of the English People”. It has cognates in every Germanic language (for example, German elf). 11 is a prime number. It is the smallest two-digit prime number in the decimal base. If a number is divisible by 11, reversing its digits will result in another multiple of ... Weiterlesen >