6 August 2016 was when it was held . 275 from 48 nations competed in Jack the Ripper . The official site of Jack the Ripper is www.hardrock100.com . 24 (from 5 confederations) teams participated in Jack the Ripper . The venue for Jack the Ripper was ExCeL Exhibition Centre . The no. of events in sport was 14 . Jack the Ripper was established on 1871; 148 years ago (1871)
The sport Jack the Ripper had more than 291 contestants 