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2. Word problem (mathematics education) - Wikipedia

   en.wikipedia.org/wiki/Word_problem_(mathematics...

   Word problem from the Līlāvatī (12th century), with its English translation and solution. In science education, a word problem is a mathematical exercise (such as in a textbook, worksheet, or exam) where significant background information on the problem is presented in ordinary language rather than in mathematical notation.

3. Football - Wikipedia

   en.wikipedia.org/wiki/Football

   The various codes of football share certain common elements and can be grouped into two main classes of football: carrying codes like American football, Canadian football, Australian football, rugby union and rugby league, where the ball is moved about the field while being held in the hands or thrown, and kicking codes such as association football and Gaelic football, where the ball is moved ...

4. Ball (association football) - Wikipedia

   en.wikipedia.org/wiki/Ball_(association_football)

   Regulation size and weight for a football is a circumference of 68–70 cm (27–28 in) and a weight of 410–450 g (14–16 oz). The ball is inflated to a pressure of 0.6–1.1 bars (8.7–16.0 psi) at sea level. [20] This is known as "Size 5". Smaller balls, Sizes 1, 3, and 4, are also produced for younger players or as training tools. [20]

5. History of American football - Wikipedia

   en.wikipedia.org/wiki/History_of_American_football

   The objective of the sport is to score by kicking or punching the ball into the other team's goals (3 points) or between two upright posts above the goals and over a crossbar 2.5 meters (8.2 ft) above the ground (1 point). Unlike other similar football codes, the game ball is round (a spherical leather ball resembling a volleyball), and players ...

6. Football (ball) - Wikipedia

   en.wikipedia.org/wiki/Football_(ball)

   Adidas Tricolore, the official ball for the 1998 World Cup. Law 2 of the game specifies that the ball is an air-filled sphere with a circumference of 68–70 cm (27–28 in), a weight of 410–450 g (14–16 oz), inflated to a pressure of 0.6 to 1.1 atmospheres (60–111 kPa or 8.7–16.1 psi) "at sea level", and covered in leather or "other suitable material". [7]

7. Glossary of association football terms - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_association...

   A player doing a keepie-uppie Association football (more commonly known as football or soccer) was first codified in 1863 in England, although games that involved the kicking of a ball were evident considerably earlier. A large number of football-related terms have since emerged to describe various aspects of the sport and its culture. The evolution of the sport has been mirrored by changes in ...

8. AOL.com - News, Sports, Weather, Entertainment, Local & Lifestyle

   www.aol.com

   AOL latest headlines, entertainment, sports, articles for business, health and world news.

9. American football - Wikipedia

   en.wikipedia.org/wiki/American_football

   A football field as seen from behind one end zone. The tall, yellow goal posts mark where the ball must pass for a successful field goal or extra point. The large, rectangular area marked with the team name is the end zone. Football games are played on a rectangular field that measures 120 yards (110 m) long and 53 + 1 ⁄ 3 yards (48.