(いく)

いくつ
pronoun
how many; how old
1. how many
Used to ask about quantity, especially for items counted with the general counter つ.
How many apples are there?
(いく)()しいです
How many do you want?
How many eggs did you buy?
How many windows are there in the room?
Let's buy some sweets on our way home.
幾つか = some, several
2. how old
Used to ask about someone's age, particularly for children or in casual contexts.
How old is your child?
Asking about age
How old is the baby now?
(いく)です三十五(さんじゅうご)です
How old are you? I'm thirty-five.
Polite form for adults
(おとうと)(いく)です(いつ)です
How old is your younger brother? He's five.
How old will you be next week? I'll be six.

(いく)つ asks about quantity (how many?) or age (how old?). Often written in hiragana as いくつ.

SENSE 1 — QUANTITY:

Corresponds to the counter つ system ((ひと)つ, (ふた)つ, etc.). Used for general counting of items.

  • りんごは(いく)つありますか: How many apples are there?

SENSE 2 — AGE:

Commonly used for children. For adults, the polite form お(いく)つですか is appropriate.

  • ()さんは(いく)つですか: How old is your child?
  • (いく)つですか: How old are you? (polite, for adults)
  • 何歳(なんさい)ですか: How old are you? (direct alternative)

RELATED FORMS:

  • (いく)つか: some, several
  • (いく)つも: many, numerous
  • (いく)つになっても: no matter how old one gets