Issue with figuring out what [どう+なの] correctly translates to in the following sentence


I have translated most of the following sentence on my own, but I am having
great difficulty in understanding then translating the ending of どうなの.

> 教え子の名前ぐらい、もう少し考えたら **どうなの** ？

According to nevan king answer at [What exactly is "なの"
(nano)?](https://japanese.stackexchange.com/questions/514/what-exactly-
is-%E3%81%AA%E3%81%AE-nano) ,

> The な is only there if you use it after a noun or a na-adjective (きれい, 大変,
> 非常).

However, as far as I am aware, according to
[https://dictionary.goo.ne.jp/word/en/どう/#je-52734](https://dictionary.goo.ne.jp/word/en/%E3%81%A9%E3%81%86/#je-52734)
and based on the context (shown below), the どう here most likely means "the
same". Whether どう is a noun or na-adjective is unknown to me; so I can't
accurately use [What exactly is "なの"
(nano)?](https://japanese.stackexchange.com/questions/514/what-exactly-
is-%E3%81%AA%E3%81%AE-nano) to help me understand its meaning.

> しかし、アインにツヴァイか……。  
>  教え子の名前ぐらい、もう少し考えたら **どうなの** ？

TDLR: What does どうなの mean in the above sentence?




If you have seen 考えてはどうですか before, this 考えたらどうなの is a variation of it. たら is a
condition marker, どう is "how", な is the attributive form of the copula, の is
["explanatory-no"](https://japanese.stackexchange.com/a/5399/5010) (or a seek-
for-clarification marker as explained [here](https://www.wasabi-
jpn.com/japanese-grammar/question-markers/)). In general, `conditional + どう/如何
+ copula + question marker` (literally "how is it like if you ～") forms a
suggestion/advice. (な)の is optional, but it essentially makes the suggestion
stronger by adding a little doubtful tone ("I wonder why you don't ～").

There are many variations, each with a different omission/formality/politeness
level.

  * お考えになっては如何【いかが】でしょうか？ (highly polite)
  * 考えてはどうなのですか？
  * お考えになっては？ (everything after a condition marker can be omitted)
  * 考えては如何？
  * 考えたらどう？
  * 考えたらどうなん？
  * 考えたらどっすか？
  * 考えたらどうなのよ？
  * 考えたら？

Related:

  * [in 買っては, I need some explanation for っては part](https://japanese.stackexchange.com/q/25928/5010)
  * [What does たら do at the end of a sentence?](https://japanese.stackexchange.com/q/29766/5010)

