Norwegian numbers 1 to 10 are: én/ett (1), to (2), tre (3), fire (4), fem (5), seks (6), sju or syv (7), åtte (8), ni (9), ti (10). The form ett is used when the noun is neuter — for example "ett år" (one year).

Ordinals mark order or position: første (1st), andre (2nd), tredje (3rd), fjerde (4th), femte (5th), and so on. From 5th onward most ordinals end in -ende (niende, tiende). They are used for dates, rankings, and floors in a building. For example "17. mai" reads as "syttende mai".

Norwegian phone numbers are eight digits and are traditionally read in pairs. The number 22 45 67 89 is said "tjueto — førtifem — sekstisju — åttini". In casual speech people sometimes say each digit individually, but pairs are still the standard, especially on voicemail and answering machines.

Both mean "seven". Sju is the reformed, modern Norwegian spelling recommended since 1938 and is taught in schools. Syv is the traditional Danish-influenced form and is still common in speech, especially in eastern Norway and among older speakers. The same pattern applies to tjue/tyve (20) and tretti/tredve (30).

Use "klokka er" ("the clock is") plus the number: klokka er to (it is two). For half hours Norwegian says "halv" plus the NEXT hour — "halv tre" means 2:30, not 3:30. "Kvart over tre" is 3:15 and "kvart på fire" is 3:45. Minutes past or before use "over" and "på" respectively: "ti på fire" is 3:50.

Norwegian numbers are much more regular than Danish. Danish still uses the base-20 (vigesimal) system for 50–90 (halvtreds, tres, halvfjerds), which Norwegian does not. Swedish is closer — femtio (50), sextio (60) — but differs in spelling and word forms. Swedish sju is identical to Norwegian sju, but Swedish has no syv variant.