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WikiCards · Card list · Science cards · Imaginary unit
Uncommon card · Science
Imaginary unit, an Uncommon card
The imaginary unit, usually denoted by i, is a mathematical constant that is a solution to the quadratic equation x2 = −1, which is not solved by any real number.
- Rarity
- Uncommon
- Domain
- Science
- ATK
- 69
- DEF
- 48
- Power
- 117
- Wikipedia reads a year
- 130,000
Power 117 (ATK + DEF): stronger than 65 % of WikiCards cards.
Imaginary unit quiz: 3 questions
Three questions on the Imaginary unit card, the way WikiCards duels ask them. Pick an answer, the facts are just below.
Find the missing word
Any real-number ______ of the imaginary unit is called an imaginary number.
Answer
multiple. Any real-number multiple of the imaginary unit is called an imaginary number. From the Imaginary unit article on Wikipedia.
Which of these Wikipedia articles is read the most in a year?
Answer
Caesar cipher. Caesar cipher 320,000 · System 190,000 · Imaginary unit 130,000 · Bus 90,000 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.
- Any real-number multiple of the imaginary unit is called an imaginary number.
- By combining the real numbers with the imaginary unit using addition and multiplication, a new number system known as the complex numbers is formed, it consists of all numbers of the form a + bi with real numbers a and b. There are two complex square roots of −1: the imaginary unit i, and its additive and multiplicative inverse, −i.
- More generally, every nonzero complex number has two distinct complex-valued square roots, which are additive inverses of each other, while zero has only zero as its square root.
Why it is Uncommon
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Imaginary unit article was read about 130,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 69 and blocks with 48: each hit it takes is cut by 19 %.
How to get Imaginary unit
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 Imaginary unit in the power ranking, all domains together.
- BratwurstUncommon · Society · ATK 65 DEF 52
- CucurbitaceaeUncommon · Nature · ATK 70 DEF 47
- Working classUncommon · Society · ATK 66 DEF 51
- PampasUncommon · Nature · ATK 68 DEF 49
- Tropic of CapricornUncommon · Society · ATK 65 DEF 52
- Battle of AnkaraUncommon · History · ATK 62 DEF 55
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, Imaginary unit (revision), CC BY-SA 4.0. Photo : Loadmaster (David R. Tribble) This image was made by Loadmaster (David R. Tribble) . Email, CC BY-SA 3.0, Wikimedia Commons.
