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Frobenius coin problem with 2-pence and 5-pence coins visualised as graphs: Sloping lines denote graphs of 2x+5y=n where n is the total in pence, and x and y are the non-negative number of 2p and 5p coins, respectively. A point on a line gives a combination of 2p and 5p for its given total (green).
Coin flipping, coin tossing, or heads or tails is the practice of throwing a coin in the air and checking which side is showing when it lands, in order to randomly choose between two alternatives. It is a form of sortition which inherently has two possible outcomes.
A coin that has been graded and authenticated by one of numerous independent grading services. [1] See also encapsulated coin. chop-mark See banker's mark. church tokens. Also called Communion tokens. Tokens generally issued initially by Scottish parishes (die stamped one-side only to show the parish) and later in the United States and Canada.
Texas Instruments BA II Plus Professional. The BA II Plus is the main financial calculator sold by Texas Instruments as of 2015. It provides basic scientific calculator functionality alongside its financial functions, and provides most of its financial functions in the form of worksheets, where values are input as variables in a table; when a computation is requested, the calculator plugs the ...
Early exercises deal with addition, subtraction, multiplication, and division of integers. Extensive courses of exercises in school extend such arithmetic to rational numbers . Various approaches to geometry have based exercises on relations of angles , segments , and triangles .
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