24 (from 5 confederations) teams participated in Jack the Ripper . 14 events were there in Jack the Ripper . ExCeL Exhibition Centre were the venues of Jack the Ripper . It was held in 6 August 2016 . The sport has the official site www.hardrock100.com . 275 from 48 nations were the competitors in Jack the Ripper . 1871; 148 years ago (1871) is when Jack the Ripper was founded 
The sport Jack the Ripper has less than180 contenders  from less than 24 nations