quizzical
1. [ adjective ] playfully vexing (especially by ridicule)
Synonyms: teasing mocking
Examples:

"his face wore a somewhat quizzical almost impertinent air"- Lawrence Durrell

Related terms: playful
2. [ adjective ] perplexed (as if being expected to know something that you do not know)
Synonyms: questioning
Examples:

"he had a quizzical expression"

Related terms: perplexed
Similar spelling:   quizzically