1 thing
ひとつ
hitotsu
2 things
ふたつ
futatsu
3 things
みっつ
mittsu
4 things
よっつ
yottsu
5 things
いつつ
itsutsu
6 things
むっつ
muttsu
7 things
ななつ
nanatsu
8 things
やっつ
yattsu
9 things
ここのつ
kokonotsu
10 things
とお
too
how many things
いくつ
ikutsu
i.e. ringo ga ikutsu arimasu ka.