WikiCards
Play on iPhone nowFree in Safari. Add it to your Home Screen.Play
WikiCards · Card list · Science cards · Martingale
Uncommon card · Science
Martingale, an Uncommon card
In probability theory, a martingale is a stochastic process in which the expected value of the next observation, given all prior observations, is equal to the most recent value.
- Rarity
- Uncommon
- Domain
- Science
- ATK
- 68
- DEF
- 37
- Power
- 105
- Wikipedia reads a year
- 150,000
Power 105 (ATK + DEF): stronger than 45 % of WikiCards cards.
Martingale quiz: 3 questions
Three questions on the Martingale card, the way WikiCards duels ask them. Pick an answer, the facts are just below.
Find the missing word
In other words, the ______ expectation of the next value, given the past, is equal to the present value.
Answer
conditional. In other words, the conditional expectation of the next value, given the past, is equal to the present value. From the Martingale article on Wikipedia.
Which of these cards hits hardest (highest ATK)?
Answer
Martingale. Martingale 68 · Laws of thermodynamics 64 · Caiman 61 · Gouache 57 ATK in WikiCards.
Which of these Wikipedia articles is read the most in a year?
Answer
Laws of thermodynamics. Laws of thermodynamics 270,000 · Giorgio A. Tsoukalos 200,000 · Martingale 150,000 · Flag semaphore 97,000 Wikipedia reads over a year.
In a duel, each round asks a question like these about the opposing card, with 15 seconds to answer.
The facts on the card
The card carries these facts from its Wikipedia article.
- In other words, the conditional expectation of the next value, given the past, is equal to the present value.
- Martingales are used to model fair games, where future expected winnings are equal to the current amount regardless of past outcomes.
Why it is Uncommon
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Martingale article was read about 150,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 68 and blocks with 37: each hit it takes is cut by 15 %.
How to get Martingale
Open packs. Each pack holds five cards drawn from real Wikipedia articles, the rarest last, and the fifth card is always Rare or better. The odds are shown in the game. A free pack arrives every hour and two can wait, and the Coins you win in duels buy more packs.
More Science cards
Cards close in power
The cards just above and just below Martingale in the power ranking, all domains together.
- GouacheUncommon · Arts · ATK 57 DEF 48
- Muhammad Ali dynastyUncommon · History · ATK 64 DEF 41
- GravitonUncommon · Science · ATK 65 DEF 40
- AkihabaraUncommon · Society · ATK 55 DEF 50
- CaledoniaUncommon · History · ATK 60 DEF 45
- Porfirio RubirosaUncommon · History · ATK 60 DEF 45
Card lists
- Wikipedia quizNew questions every day
- All cards from A to ZEvery card, by name
- Science cards
- Legendary cards
- Tier listS and A tiers by power (ATK + DEF)
Credits
Text : Wikipedia, Martingale (revision), CC BY-SA 4.0. Photo : Thomas Steiner, CC BY-SA 3.0, Wikimedia Commons.
