68256
Is there a way to use 何 with the general counter ~つ to ask "how many..." in
the same vein as in sentences like "何歳ですか。" or "本は何冊買いましたか。"?

If not, how do you ask something like "How many ideas do you have", where (I
think) one would normally use the generic counter? Do you have to resort to
何個?
CC BY-SA 4.0
2019-05-15T14:09:30.190
68253
2019-05-15T15:15:19.993
33212
question
grammar counters
Using 何 with the general counter ~つ
> Is there a way to use 何 with the general counter ~つ to ask "how many..."

No, we don't say 何つ. We say いくつ (幾つ).

> If not, how do you ask something like "How many ideas do you have", where (I
> think) one would normally use the generic counter?

You could use いくつ, as in 「アイデアはいくつありますか。」「いくつアイデアが浮かびましたか。」 etc...
CC BY-SA 4.0
2019-05-15T15:15:19.993
68256
2019-05-15T15:15:19.993
9831
68253
answer