Find number abcIf ba9aa - 70b05 = cacac find number abc. Multiple solutions may exist.
Correct answers: 22
The first user who solved this task is Djordje Timotijevic.
John Boyd DunlopDied 23 Oct 1921 at age 81 (born 5 Feb 1840).Scottish inventor who was a pioneer of the pneumatic tyre. In 1887, when his 9-yr-old son complained of the rough ride he experienced on his tricycle over the cobbled streets of Belfast. Dunlop devised and fitted rubber air tubes held on to a wooden ring by tacking a linen covering fixed around the wheels. Due to the major improvement in riding comfort, Dunlop continued development, until he patented the idea, issued on 7 Dec 1889 (No. 10607) as "An improvement in Tyres of Wheels for Bicycles, Tricycles or other Road Cars".