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Which number replaces the qu...

Which number replaces the question mark?

Correct answers: 340

The first user who solved this task is Roxana zavari.

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Car-synergic

Why are there so many cigarette ads at auto races?
Because the tobacco companies will profit from car-synergic events.

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Candian patent No.1

In 1869, the Canadian patent No. 1 was issued to W. Hamilton. According to the Canadian Intellectual Property Office, the first Canadian patent, issued before the present number series, "was granted in 1791 by the Governor General in Council to Angus MacDonnel, a Scottish soldier garrisoned at Quebec City, and to Samuel Hopkins, a Vermonter, for processes to make potash and soap from wood ash." Hopkins also was granted the first U.S. patent by George Washington, dated 31 July 1790 for an improvement "in the making Pot ash and Pearl ash by a new Apparatus and Process."

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