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Can you find the area...

There is a figure below (a rectangle). You can see different colors depicting different regions of the figure. The labels on the top of a region defines the area of that region. Can you find the area of the green shaded region labelled with a question mark?

Correct answers: 104

The first user who solved this task is Neelima Subrahmanyam.

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How confident people are

You can determine how confident people are by listening to what they don't say about themselves.~ Author Unknown

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First airplane stamp design

In 1913, the world's first stamp to depict an airplane (a biplane) went on sale at U.S. Post Offices. (It was issued two weeks earlier, on 16 Dec 1912, six years prior to the first U.S. airmail stamps.) It was a 20-cent Parcel Post stamp, with carmine rose red ink, titled “Aeroplane Carrying Mail,”part of a series of 12 stamps for use on parcel post. On 24 Aug 1912, Congress had authorized the U.S. Post Office to enter the parcel post business to improve service for rural areas poorly served by private delivery companies. Four stamps in the series showed workers (including 3c. "Railway Postal Clerk," 4c. "Rural Carrier" in a horse-drawn wagon). Four more had transportation methods (including a 5c. "Mail Train," 10c. "Steamship and Mail Tender," 15c."Automobile Service"), and others showed industries.«

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