ERJ Brainteaser: July

The European Rubber Journal has introduced its July brainteaser, a weekly challenge with questions of varying difficulty. The first question is: Not double 109.4, 218.7, 437.4, 874.9, _?_. Readers are invited to email their answers, with correct replies to be announced on Friday. The winner will be considered for the prestigious Brainiac of the Month title. The brainteaser is part of the journal’s Brainiac section, which features a range of puzzles and challenges for readers. The journal also reports on the latest news and developments in the rubber and tire industry, including the performance of rubber and tire machinery makers, the EU chemicals industry, and the plans of Chinese groups in the sector.