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What number comes next?

Look at the series (2520, 1260, 840, 630, 504, 420, 360, 315, ?), determine the pattern, and find the value of the next number!

Correct answers: 70

The first user who solved this task is Djordje Timotijevic.

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April Fool's Day - Kid’s Socks

Sew one of your kid’s socks closed halfway down. If you’re the sewing type this prank will leave you in stitches.

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SOS

In 1906, “SOS” was specified as the international distress signal, in a document signed by representatives of 27 nations at the second International Wireless Telegraph Convention in Berlin. It would replace the earlier Marconicall sign CQD. By 1904 many transatlantic British ships had wireless equipment. First used in England on landline wires, “CQ” preceded time signals and special notices as a sign for “all stations.” The Marconi company suggested adding the “D” meaning distress. The code “CQD” was established as a distress signal on 1 Feb 1904, but was never chosen from such a phrase as “Come Quick Danger.” The 1906 Conference proceedings do not detail the discussions about the choice of SOS. The likely reason is that it was speedy to tap out (not from “Save Our Souls”).

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