Compare: 如何 vs 如何

葉巻はいかが？

Have a cigar?

例の仕事はいかがでしょう？

How is that business progressing?

別(べつ)の理由があるね？どう？図星でしょう？

There's another reason, isn't there? Well, how did I do? I bet I hit the mark.

ダイエット中(ちゅう)脱力感がでます、どうすればよい？

I feel lethargic when I diet, what should I do?