Information about 7 countries from each continent.
We have sorted them by descending order according to economical stand.

USA

The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territories, 326 Indian reservations, and some minor possessions.[j] At 3.8 million square miles (9.8 million square kilometers), it is the world's third- or fourth-largest country by total area.[d] The United States shares significant land borders with Canada to the north and Mexico to the south as well as limited maritime borders with the Bahamas, Cuba, and Russia.[22] With a population of more than 331 million people, it is the third-most populous country in the world. The national capital is Washington, D.C., and the most populous city is New York City.

CHINA

China (Chinese: 中国; pinyin: Zhōngguó; lit. 'Central State; Middle Kingdom'), officially the People's Republic of China (Chinese: 中华人民共和国; pinyin: Zhōnghuá Rénmín Gònghéguó; abbr: PRC), is a country in East Asia. It is the world's most populous country, with a population of more than 1.4 billion. China follows a single standard time offset of UTC+08:00 even though it spans five geographical time zones and borders 14 countries, the second most of any country in the world after Russia. Covering an area of approximately 9.6 million square kilometres (3.7 million mi2), it is the world's third or fourth largest country.[i] The country is officially divided into 23 provinces,[j] five autonomous regions, four direct-controlled municipalities; Beijing (capital city), Chongqing, Shanghai (largest city) and Tianjin, and two special administrative regions; Hong Kong and Macau.

GERMANY

Germany (German: Deutschland, pronounced [ˈdɔʏtʃlant] (About this soundlisten)), officially the Federal Republic of Germany,[e] is a country in Central Europe. It is the second-most populous country in Europe after Russia, and the most populous member state of the European Union. Germany is situated between the Baltic and North seas to the north, and the Alps to the south; covering an area of 357,022 square kilometres (137,847 sq mi), with a population of over 83 million within its 16 constituent states. It borders Denmark to the north, Poland and the Czechia to the east, Austria and Switzerland to the south, and France, Luxembourg, Belgium, and the Netherlands to the west. The nation's capital and largest city is Berlin, and its financial centre is Frankfurt; the largest urban area is the Ruhr.

BRAZIL

Brazil (Portuguese: Brasil; Brazilian Portuguese: [bɾaˈziw]),[nt 4] officially the Federative Republic of Brazil (Portuguese: About this soundRepública Federativa do Brasil),[11] is the largest country in both South America and Latin America. At 8.5 million square kilometers (3,300,000 sq mi)[12] and with over 211 million people, Brazil is the world's fifth-largest country by area and the sixth most populous. Its capital is Brasília, and its most populous city is São Paulo. The federation is composed of the union of the 26 states and the Federal District. It is the largest country to have Portuguese as an official language and the only one in the Americas;[13][14] it is also one of the most multicultural and ethnically diverse nations, due to over a century of mass immigration from around the world;[15] as well as the most populous Roman Catholic-majority country.

AUSTRALIA

Australia, officially the Commonwealth of Australia, is a sovereign country comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands.[13] It is the largest country by area in Oceania and the world's sixth-largest country. Australia's population of nearly 26 million,[7] in an area of 7,617,930 square kilometres (2,941,300 sq mi),[14] is highly urbanised and heavily concentrated on the eastern seaboard.[15] Canberra is the nation's capital, while the largest city is Sydney, and other major metropolitan areas include Melbourne, Brisbane, Perth, and Adelaide.

NIGERIA

Nigeria (/naɪˈdʒiriə/ Listen), officially the Federal Republic of Nigeria, is a country in West Africa. It is the most populous country in Africa; geographically situated between the Sahel to the north, and the Gulf of Guinea to the south in the Atlantic Ocean; covering an area of 923,769 kilometres (574,003 mi), with a population of over 211 million. Nigeria borders Niger in the north, Chad in the northeast, Cameroon in the east, and Benin in the west. Nigeria is a federal republic comprising 36 states and the Federal Capital Territory, where the capital, Abuja, is located. The largest city in Nigeria is Lagos, one of the largest metropolitan areas in the world and second largest in Africa.

ANTARCTICA

Antarctica (/ænˈtɑːrtɪkə/ or /ænˈtɑːrktɪkə/ (About this soundlisten))[note 1] is Earth's southernmost continent. It contains the geographic South Pole and is situated in the Antarctic region of the Southern Hemisphere, almost entirely south of the Antarctic Circle, and is surrounded by the Southern Ocean. At 14,200,000 square kilometres (5,500,000 square miles), it is the fifth-largest continent and nearly twice the size of Australia. It is by far the least populated continent, with around 5,000 people in the summer and around 1,000 in the winter. About 98% of Antarctica is covered by ice that averages 1.9 km (1.2 mi; 6,200 ft) in thickness,[5] which extends to all but the McMurdo Dry Valleys and the northernmost reaches of the Antarctic Peninsula.[6]