Floor and ceiling functions, an Uncommon card

In mathematics, the floor function is the function that takes a real number x as input and returns the greatest integer less than or equal to x, written ⌊x⌋ or floor.
From the Wikipedia article

Rarity: Uncommon
Domain: Science
ATK: 73
DEF: 66
Power: 139
Wikipedia reads a year: 120,000

Power 139 (ATK + DEF): stronger than 70 % of WikiCards cards.

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Floor and ceiling functions quiz: 3 questions

Three questions on the Floor and ceiling functions card, the way WikiCards duels ask them. Pick an answer, the facts are just below.

Find the missing word
For ______, for floor: ⌊2.4⌋ = 2, ⌊−2.4⌋ = −3, and for ceiling: ⌈2.4⌉ = 3, and ⌈−2.4⌉ = −2.
Answer
example. For example, for floor: ⌊2.4⌋ = 2, ⌊−2.4⌋ = −3, and for ceiling: ⌈2.4⌉ = 3, and ⌈−2.4⌉ = −2. From the Floor and ceiling functions article on Wikipedia.
Which of these cards hits hardest (highest ATK)?
Answer
Coffeehouse. Coffeehouse 84 · Algorithm 80 · Floor and ceiling functions 73 · Aubrey Beardsley 69 ATK in WikiCards.
Which of these Wikipedia articles is read the most in a year?
Answer
Algorithm. Algorithm 410,000 · Space 280,000 · Intelligence 180,000 · Floor and ceiling functions 120,000 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.

Similarly, the ceiling function returns the least integer greater than or equal to x, written ⌈x⌉ or ceil.
For example, for floor: ⌊2.4⌋ = 2, ⌊−2.4⌋ = −3, and for ceiling: ⌈2.4⌉ = 3, and ⌈−2.4⌉ = −2.
The floor of x is also called the integral part, integer part, greatest integer, or entier of x, and was historically denoted [x].

Why it is Uncommon

Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Floor and ceiling functions article was read about 120,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 73 and blocks with 66: each hit it takes is cut by 26 %.

How to get Floor and ceiling functions

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.

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Credits

Text : Wikipedia, Floor and ceiling functions (revision), CC BY-SA 4.0. Photo : No machine-readable author provided. Omegatron ( talk · contribs ) assumed (based on copyr, CC BY-SA 3.0, Wikimedia Commons.