いく
ikutsu

Adverb

1. how many

Usually Written in Kana
いいえ、おもちゃがいくつあるかじゃなくて、鍵 かぎがいくつあるかなのよ。
iie omochaga ikutsu arukajanakute kagiga ikutsu arukananoyo.
No, not how many toys, how many keys?
Adverb

2. how old

Usually Written in Kana
あなたのお とうさんはおいくつですか。
anatano otōsanwa oikutsudesuka.
How old is your father?