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  2. Guess 2/3 of the average - Wikipedia

    en.wikipedia.org/wiki/Guess_2/3_of_the_average

    In game theory, " guess ⁠ 2 3 of the average " is a game that explores how a player’s strategic reasoning process takes into account the mental process of others in the game. [1] In this game, players simultaneously select a real number between 0 and 100, inclusive. The winner of the game is the player (s) who select a number closest to ...

  3. Birthday problem - Wikipedia

    en.wikipedia.org/wiki/Birthday_problem

    The computed probability of at least two people sharing a birthday versus the number of people. In probability theory, the birthday problem asks for the probability that, in a set of n randomly chosen people, at least two will share a birthday. The birthday paradox refers to the counterintuitive fact that only 23 people are needed for that ...

  4. 100 prisoners problem - Wikipedia

    en.wikipedia.org/wiki/100_prisoners_problem

    100 prisoners problem. Each prisoner has to find their own number in one of 100 drawers, but may open only 50 of the drawers. The 100 prisoners problem is a mathematical problem in probability theory and combinatorics. In this problem, 100 numbered prisoners must find their own numbers in one of 100 drawers in order to survive.

  5. Nerdle - Wikipedia

    en.wikipedia.org/wiki/Nerdle

    January 2022. Genre (s) Puzzle. Nerdle is a web-based number game created and developed by London -based [1] data scientist Richard Mann [2][3][1] together with his children and software developer Marcus Tettmar. Players have six attempts to guess an eight-letter calculation, with feedback given for each guess in the form of colored tiles ...

  6. Lottery mathematics - Wikipedia

    en.wikipedia.org/wiki/Lottery_mathematics

    In a typical 6/49 game, each player chooses six distinct numbers from a range of 1–49. If the six numbers on a ticket match the numbers drawn by the lottery, the ticket holder is a jackpot winner— regardless of the order of the numbers. The probability of this happening is 1 in 13,983,816. The chance of winning can be demonstrated as ...

  7. AB (game) - Wikipedia

    en.wikipedia.org/wiki/AB_(Game)

    AB, a variant of the board game Mastermind, is a number guessing game involving two players. The codemaker makes a four-digit number with no repeats, and the codebreaker tries to guess this number in as few moves as possible. When the codebreaker makes a guess, the codemaker says the amount of “A”s, or the correct digits in the number as ...

  8. GeoGuessr - Wikipedia

    en.wikipedia.org/wiki/GeoGuessr

    Release. May 2013; 11 years ago (May 2013) Mode (s) Single-player, multiplayer. GeoGuessr is a browser-based geography game in which players are tasked to guess locations from Google Street View imagery. The game features multiple game modes, including singleplayer and multiplayer competitions.

  9. 0.999... - Wikipedia

    en.wikipedia.org/wiki/0.999...

    The proof given below is a direct formalization of the intuitive fact that, if one draws 0.9, 0.99, 0.999, etc. on the number line, there is no room left for placing a number between them and 1. The meaning of the notation 0.999... is the least point on the number line lying to the right of all of the numbers 0.9, 0.99, 0.999, etc.