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I know `いくつ` means 'how old', but what does `いくつか` mean in the following
sentence?

> 緑茶、紅茶、ウーロン茶など **いくつかの種類** に分けられる。
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2015-08-01T23:39:15.133
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words
What does いくつか mean in the phrase いくつかの種類?
> I know いくつ means how old

Without context, 「いくつ」 means "how many" far more often than it means "how
old".

「いくつか」 means "some", "a few", "several", etc.
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2015-08-02T00:21:09.497
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いくつ can also be used as an interrogative for indefinite number, that is, how
many. To use indefinite expressions in non-question, か is combined with it.

  * いくつか - some number 
    * いくつかの種類 - some number of kinds
  * いつか - at some point (Of time) 
    * いつか彼には知らせるつもりだった。- I was going to tell him at some point.
  * なぜか - for some reason 
    * 彼女はなぜかこの頃私を避けてる。 - She is avoiding me for some reason.
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2015-08-02T00:23:22.317
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いくつ in general means "how many"; this can also be applied to years to ask "how
old" ("how many years") as you've pointed out.

か can be add to counter question words to mean "several ～".

>   * ラーメン屋に学生が何人かいます。 → There are several (people) students in the ramen
> restaurant.
>   * 先週のお祭りに何個かのたこ焼きを食った。 → I ate several takoyaki (balls) at the festival
> last week.
>   * 緑茶、紅茶、ウーロン茶などいくつかの種類に分けられる。 → Tea is divided into several kinds, such as
> green tea, black tea, and oolong tea.
>
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2015-08-02T00:24:16.883
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