The books are ours.
The correct sentence would be: "Are the books theirs or ours?" Note the use of the possessive pronouns "theirs" and "ours" to indicate ownership, as well as the question mark at the end to indicate that it is a question.
Ours or theirs?
My, Mine, Your, Yours, His, Hers, Our, Ours, Their, Theirs, Its
no because ours is smaller and theirs is bigger
Their is already plural, the possessive form of the third person plural (they, them). The word "theirs" is a predicate adjective form (such as mine, ours, yours, and hers).
No. Ours is a possessive pronoun. It requires no punctuation to show possession.
Subject (before a noun): (singular) my, your, his (plural) our, your, their Object (after a noun): (singluar) mine, yours, his, hers (plural) ours, yours, theirs. "Its" can be used in both subjective senses, but not objective.
A possessive pronoun is a pronoun that indicates ownership or possession. Examples include "mine," "yours," "his," "hers," "ours," and "theirs." Possessive pronouns do not require an additional noun to show ownership because they already indicate possession.
A possessive pronoun shows ownership. The possessive pronouns are mine, yours, his, hers, its, ours, theirs.
Possessive pronouns do not have apostrophes. Examples: his, hers, theirs, yours, and ours.
Practically the same things we use now in 2009 but theirs wasnt as strong as ours are!
"The Charge of the Light Brigade" is an 1854 narrative poem by Alfred, Lord Tennyson'Forward, the Light Brigade!'Was there a man dismay'd?Not tho' the soldiers knewSome one had blunder'd:Theirs not to make reply,Theirs not to reason why,Theirs but to do & die,Into the valley of DeathRode the six hundred