2 Solomon answered all her questions; nothing was too hard for him to explain to her.

Read 2 Chronicles 9:2 Using Other Translations

And Solomon told her all her questions: and there was nothing hid from Solomon which he told her not.
And Solomon answered all her questions. There was nothing hidden from Solomon that he could not explain to her.
Solomon had answers for all her questions; nothing was too hard for him to explain to her.