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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. The party who calls the side that is facing up when the coin lands wins.
Penney's game. Penney's game, named after its inventor Walter Penney, is a binary (head/tail) sequence generating game between two players. Player A selects a sequence of heads and tails (of length 3 or larger), and shows this sequence to player B. Player B then selects another sequence of heads and tails of the same length.
The obverse and reverse are the two flat faces of coins and some other two-sided objects, including paper money, flags, seals, medals, drawings, old master prints and other works of art, and printed fabrics. In this usage, obverse means the front face of the object and reverse means the back face. The obverse of a coin is commonly called heads ...
Tails. −1, +1. +1, −1. Matching pennies. Matching pennies is a non-cooperative game studied in game theory. It is played between two players, Even and Odd. Each player has a penny and must secretly turn the penny to heads or tails. The players then reveal their choices simultaneously. If the pennies match (both heads or both tails), then ...
Rules. First, a row of eight cards are dealt; this is the "Heads" row. Then 8 piles of 11 cards are dealt; this is reserve. Below them is another row of eight cards, the "Tails" row. The object of the game is to free one Ace and one King of each suit and build each of them by suit; the Aces are built up to Kings while the Kings are built down ...
Coin orientation (or coin alignment or variations of these) is the relation of the vertical orientation of the images on the obverse and reverse sides of coins to one another. The two basic relations are called medallic orientation and coin orientation .
Wilma Pearl Mankiller was born on November 18, 1945, in the Hastings Indian Hospital in Tahlequah, Oklahoma, to Clara Irene (née Sitton) and Charley Mankiller. [4] [5] Her father was a full-blooded Cherokee, [4] [6] whose ancestors had been forced to relocate to Indian Territory from Tennessee over the Trail of Tears in the 1830s.
Fair coin. A fair coin, when tossed, should have an equal chance of landing either side up. In probability theory and statistics, a sequence of independent Bernoulli trials with probability 1/2 of success on each trial is metaphorically called a fair coin. One for which the probability is not 1/2 is called a biased or unfair coin.