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WikiCards · Card list · Science cards · Ordinal number
Uncommon card · Science
Ordinal number, an Uncommon card
In set theory, an ordinal number, or ordinal, is a generalization of ordinal numerals aimed to extend enumeration to infinite sets.
- Rarity
- Uncommon
- Domain
- Science
- ATK
- 79
- DEF
- 56
- Power
- 135
- Wikipedia reads a year
- 140,000
Power 135 (ATK + DEF): stronger than 65 % of WikiCards cards.
Ordinal number quiz: 3 questions
Three questions on the Ordinal number card, the way WikiCards duels ask them. Pick an answer, the facts are just below.
Find the missing word
Usually Greek letters are used for ordinal number variables to help ______ them from natural number variables.
Answer
distinguish. Usually Greek letters are used for ordinal number variables to help distinguish them from natural number variables. From the Ordinal number article on Wikipedia.
Which of these cards hits hardest (highest ATK)?
Answer
Ordinal number. Ordinal number 79 · Encryption 73 · Hindu–Arabic numeral system 70 · Category 5 cable 67 ATK in WikiCards.
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.
- Usually Greek letters are used for ordinal number variables to help distinguish them from natural number variables.
- A finite set can be enumerated by successively labeling each element with the least natural number that has not been previously used.
- To extend this process to various infinite sets, ordinal numbers are defined more generally as a linearly ordered class of numbers that include the natural numbers and have the property that every non-empty collection of ordinals has a least or "smallest" element.
Why it is Uncommon
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Ordinal number article was read about 140,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 79 and blocks with 56: each hit it takes is cut by 22 %.
How to get Ordinal number
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 Ordinal number in the power ranking, all domains together.
- Estates of the realmUncommon · Society · ATK 76 DEF 59
- Michael MoritzUncommon · Society · ATK 70 DEF 65
- Muhammad AhmadUncommon · History · ATK 71 DEF 64
- Santa Cruz de la SierraUncommon · Nature · ATK 77 DEF 58
- StethoscopeUncommon · Science · ATK 68 DEF 67
- Cayetana Fitz-James Stuart, 18th Duchess of AlbaUncommon · History · ATK 71 DEF 64
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, Ordinal number (revision), CC BY-SA 4.0. Photo : Jochen Burghardt, CC0, Wikimedia Commons.
