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In the United States, approximately 6.5 billion greeting cards are bought each year, at a total cost of more than US$7 billion. [1] A counter card in the U.S. typically sells for $2 to $4. [1] Boxed cards, which are a popular option for Christmas cards or other times when multiple cards are sent, tend to cost less.
Paper Money of the United States: A Complete Illustrated Guide With Valuations (19th ed.). Coin & Currency Institute. ISBN 978-0-87184-519-1; Knox, John Jay (1888). United States Notes: A history of the various issues of paper money by the government of the United States (3rd ed.). Charles Scribner’s Sons.
Card money was first used in Dutch Guiana, now Suriname, in 1761. Issues could be on plain cards or playing cards, and were at first cut into circles approximately 38 millimetres (1.5 in) in diameter, resembling coins. Later card money was rectangular, in order to save on labor, although some issues continued to be round or even hexagonal.
Monopoly money (symbol: ₩) is a type of play money used in the board game Monopoly. It is different from most currencies , including the American currency or British currency upon which it is based, in that it is smaller, one-sided, and does not have different imagery for each denomination.
A simple fraction (also known as a common fraction or vulgar fraction) [n 1] is a rational number written as a/b or , where a and b are both integers. [9] As with other fractions, the denominator (b) cannot be zero. Examples include 1 / 2 , − 8 / 5 , −8 / 5 , and 8 / −5 .
Paper currency grading is the process of determining the grade or condition of a bank note, one of the key factors in determining its collectible value. A banknotes grade is generally determined by crispness (Rigid, not limp paper), brightness, and depth of color.
In a deck of playing cards, the term face card (US) or court card (British and US), [1] and sometimes royalty, is generally used to describe a card that depicts a person as opposed to the pip cards. In a standard 52-card pack of the English pattern , these cards are the King , Queen and Jack .
With M = 365 days in a year, the average number of people required to find a pair with the same birthday is n = 1 + Q(M) ≈ 24.61659, somewhat more than 23, the number required for a 50% chance. In the best case, two people will suffice; at worst, the maximum possible number of M + 1 = 366 people is needed; but on average, only 25 people are ...