Advanced Numeral Syntax | Russian Grammar

By the time you reach this page you already know the basic government rule: a number keys the noun's case off its last digit. That rule handles the nominative and accusative of the noun. This page is about everything the rule leaves unsaid — the corners where Russian numbers fight back. They are not exotic; they come up the moment you describe two tall buildings, say you saw two students, mention twenty-five roubles in the instrumental, or report that there were three of you. Each corner has its own logic, and once you see the logic the apparent chaos resolves into a small set of patterns.

Adjectives inside a 2-4 phrase: the masculine/feminine split

The basic rule puts the noun into the genitive singular after 2, 3, 4 (два до́ма). But an adjective sitting between the number and the noun does not simply copy that genitive singular. Here the gender of the noun decides:

Masculine and neuter nouns: the adjective goes genitive plural while the noun stays genitive singular. два больши́х до́ма — больши́х is genitive plural, до́ма is genitive singular. This mismatch (plural adjective, singular noun) feels wrong but is correct and obligatory.
Feminine nouns: the adjective is normally nominative plural. две но́вые кни́ги — но́вые is nominative plural, кни́ги genitive singular. The genitive-plural variant (две но́вых кни́ги) also exists and is acceptable, but careful modern speech prefers the nominative plural for feminines.

Мы сня́ли два больши́х но́мера с ви́дом на мо́ре.

We booked two big rooms with a sea view. (masculine: больши́х genitive plural, но́мера genitive singular)

На столе́ лежа́ли две но́вые кни́ги и три ста́рых журна́ла.

Two new books and three old magazines were lying on the table. (feminine две но́вые — nominative plural; masculine три ста́рых — genitive plural)

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The split is worth over-drilling because it is so counter-intuitive: after 2/3/4, picture the adjective and noun in different numbers. Masculine/neuter → adjective genitive plural over a genitive singular noun (два больши́х до́ма). Feminine → adjective nominative plural over a genitive singular noun (две но́вые кни́ги).

Animacy in the accusative

In the accusative, small numbers behave like a declinable word that must respect animacy — the same animacy that elsewhere makes the masculine accusative copy the genitive for living things. With 2, 3, 4 (and the collective numerals), an animate object pulls the whole phrase into a genitive-shaped form, while an inanimate object keeps the nominative-shaped form.

Inanimate: ви́жу два стола́ — "I see two tables." The phrase looks like the nominative/base form.
Animate: ви́жу двух студе́нтов — "I see two students." Both the numeral and the noun take genitive-plural shapes (двух, студе́нтов).

This split applies to 2, 3, 4, о́ба/о́бе, and the collectives (дво́е, тро́е). From 5 upward, animacy is normally ignored in the accusative: ви́жу пять студе́нтов uses the same form as the nominative пять студе́нтов.

В коридо́ре я уви́дел двух преподава́телей и три стола́.

In the corridor I saw two lecturers and three tables. (animate двух преподава́телей — genitive-shaped; inanimate три стола́ — base form)

Она́ пригласи́ла четверы́х друзе́й и купи́ла четы́ре биле́та.

She invited four friends and bought four tickets. (animate четверы́х друзе́й; inanimate четы́ре биле́та)

Declining compound numerals: every word moves

This is where Russian numbers earn their reputation. When a compound numeral itself declines — because the whole phrase sits in the dative, instrumental, prepositional, etc. — every word of the number takes that case, not just the last one. The government rule (which keys on the final digit) governs only the nominative and accusative; once you leave those cases, the number is no longer "governing" the noun — the number and noun simply agree in case.

Case	25 roubles
Nominative	два́дцать пять рубле́й
Genitive	двадцати́ пяти́ рубле́й
Dative	двадцати́ пяти́ рубля́м
Accusative	два́дцать пять рубле́й
Instrumental	двадцатью́ пятью́ рубля́ми
Prepositional	(о) двадцати́ пяти́ рубля́х

Notice that in every oblique case the noun goes plural and agrees with the number — рубля́м, рубля́ми, рубля́х — and that both два́дцать and пять inflect together. Hundreds and thousands inflict the same discipline: in the instrumental, 245 is двумяста́ми сорока́ пятью́, with the hundreds-word (двести → двумяста́ми) declining internally as well.

Я заплати́л за кварти́ру с двадцатью́ пятью́ рубля́ми сда́чи в карма́не.

I paid for the flat with twenty-five roubles of change in my pocket. (instrumental: both двадцатью́ and пятью́ inflect; рубля́ми agrees in the plural)

Речь шла о двухста́х сорока́ пяти́ уча́стниках.

The talk was about two hundred and forty-five participants. (prepositional: even двести declines, → двухста́х)

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For oblique-case compounds, the spoken language quietly cheats: native speakers very often leave the inner words of a big number in the nominative and decline only the last (especially the hundreds). It is technically substandard but extremely common. For C1 you should be able to produce the fully-declined form (the declension of numerals page drills it) and recognise that the lazy spoken version exists.

Collective numerals and their restrictions

The collectives — дво́е, тро́е, че́тверо, пя́теро, ше́стеро, се́меро — are an alternative way of counting that English has no equivalent for. They are not freely interchangeable with два, три. They are restricted to:

Male persons and groups of mixed/people gender: дво́е друзе́й, тро́е рабо́чих.
Children and young of animals: дво́е дете́й, тро́е котя́т.
Nouns that exist only in the plural (pluralia tantum): дво́е су́ток ("two twenty-four-hour periods"), тро́е ножниц ("three pairs of scissors") — here the collective is in fact obligatory, because пять су́ток is fine but *два су́ток is not.
Personal pronouns and "headcount" predicates: нас бы́ло тро́е ("there were three of us").

They are never used with feminine persons (не *дво́е же́нщин — say две же́нщины) and never with inanimate count nouns (не *тро́е столо́в). After a collective, the noun is genitive plural: дво́е дете́й, че́тверо студе́нтов.

Нас бы́ло тро́е, а такси́ вмеща́ло то́лько двои́х.

There were three of us, and the taxi only held two. (нас бы́ло тро́е — headcount; двои́х — accusative/genitive of the collective)

Я не спал тро́е су́ток подря́д.

I didn't sleep for three days straight. (су́тки is plural-only, so the collective тро́е is obligatory)

For the full inventory and oblique forms, see collective numerals.

Verb agreement: 2-4 plural, 5+ neuter singular

When a numeral phrase is the subject, the verb's number is variable, and the tendency follows the same 2-4 / 5+ fault line as the noun rule:

2, 3, 4 → the verb tends to be plural: Два студе́нта пришли́. The few items feel individuated, so they take a plural.
5 and up → the verb tends to be singular neuter (in the past): Пришло́ пять студе́нтов. The large quantity feels like a single mass, so it takes the impersonal neuter singular.

This is a tendency, not an absolute. With an active, agentive subject the plural creeps in even at 5+ (Пять студе́нтов пришли́ на собра́ние is fine); with an emphasis on the quantity as a total, even 2-4 can go neuter singular (На собра́ние пришло́ два челове́ка). Word order matters: a verb before the numeral favours the singular (Пришло́ пять…), a verb after it favours the plural (Пять студе́нтов пришли́…).

Два студе́нта опозда́ли на ле́кцию.

Two students were late for the lecture. (2-4 subject → plural verb опозда́ли)

На конце́рт пришло́ пять челове́к.

Five people came to the concert. (verb before a 5+ subject → neuter singular пришло́)

Approximate numbers by inversion

Russian has an elegant trick English lacks: invert the number and the noun to mean "about, roughly." Сто рубле́й is "a hundred roubles"; рубле́й сто is "about a hundred roubles." The same inversion works with measures of people, time, and distance, and is fully colloquial.

На пло́щади собрало́сь челове́к де́сять, не бо́льше.

About ten people gathered in the square, no more. (челове́к де́сять — inversion = 'roughly ten')

Подожди́ мину́т пять, я почти́ гото́в.

Wait about five minutes, I'm almost ready. (мину́т пять — 'roughly five minutes')

The explicit prepositions о́коло + genitive (о́коло десяти́ челове́к) and приме́рно / приблизи́тельно also express approximation; the approximate numbers page lays out the full toolkit.

The government of полтора́

Полтора́ ("one and a half", masculine/neuter) and полторы́ (feminine) behave like 2-4: they take the genitive singular of the noun. полтора́ часа́ ("an hour and a half"), полторы́ неде́ли ("a week and a half"). In oblique cases полтора́/полторы́ collapse into a single form полу́тора for all genders, and the noun then goes plural and agrees: о́коло полу́тора лет ("about a year and a half"), в полу́тора киломе́трах ("a kilometre and a half away").

Мы прожда́ли по́езд полтора́ часа́.

We waited for the train for an hour and a half. (полтора́ + genitive singular часа́)

Дере́вня нахо́дится в полу́тора киломе́трах отсю́да.

The village is a kilometre and a half from here. (oblique полу́тора + plural киломе́трах)

The distinguishing insight

Every difficulty on this page comes from a single fact: a Russian numeral is two-faced. In the nominative and accusative it acts like a quantifier that governs the noun and imposes an idiosyncratic case (the 1 / 2-4 / 5+ split, plus animacy). But the moment the whole phrase moves into an oblique case, the numeral stops governing and becomes an ordinary adjective-like word that agrees with its noun — every digit declining, the noun going plural. If you keep asking "is this phrase in the nominative/accusative (so the number governs) or oblique (so number and noun agree)?", the seemingly random behaviour of 2-4 adjectives, compound declension, and полтора́ all falls into place.

Common Mistakes

❌ два больши́е до́ма

Incorrect for masculine — after 2/3/4 a masculine adjective goes genitive PLURAL: два больши́х до́ма.

✅ два больши́х до́ма

two big houses (masculine: больши́х genitive plural, до́ма genitive singular)

❌ Я ви́жу два студе́нта в коридо́ре.

Incorrect — студе́нт is animate, so the accusative takes the genitive shape: ви́жу двух студе́нтов.

✅ Я ви́жу двух студе́нтов в коридо́ре.

I see two students in the corridor. (animacy → двух студе́нтов)

❌ с два́дцать пять рубля́ми

Incorrect — in the instrumental every word of the number declines: с двадцатью́ пятью́ рубля́ми.

✅ с двадцатью́ пятью́ рубля́ми

with twenty-five roubles (instrumental: both two- and five-words inflect, noun plural)

❌ дво́е же́нщин

Incorrect — collective numerals don't combine with feminine persons: say две же́нщины.

✅ две же́нщины

two women (feminine persons take ordinary cardinals, not collectives)

❌ Пришли́ пять челове́к.

Marginal/dispreferred — with a verb before a 5+ subject Russian favours the neuter singular: Пришло́ пять челове́к.

✅ Пришло́ пять челове́к.

Five people came. (5+ subject, verb first → neuter singular пришло́)

Key Takeaways

After 2, 3, 4, an adjective is genitive plural for masculine/neuter nouns (два больши́х до́ма) but nominative plural for feminine nouns (две но́вые кни́ги); the noun itself stays genitive singular.
In the accusative, animacy splits 2-4 and the collectives: inanimate ви́жу два стола́ vs animate ви́жу двух студе́нтов.
In any oblique case, every word of a compound number declines and the noun goes plural and agrees (с двадцатью́ пятью́ рубля́ми) — the number governs only in the nominative/accusative.
Collective numerals (дво́е, тро́е…) are restricted to male/mixed persons, children, plural-only nouns, and headcounts; never feminine persons or inanimate count nouns.
Verb agreement tends plural for 2-4 subjects (Два студе́нта пришли́) and neuter singular for 5+ (Пришло́ пять студе́нтов), modulated by word order and agentivity.
Approximation by inversion: челове́к де́сять, мину́т пять ("about ten/five").
Полтора́/полторы́ take the genitive singular like 2-4 (полтора́ часа́); oblique полу́тора takes a plural agreeing noun (в полу́тора киломе́трах).

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