Perplexing

The well documented violent nature of humanity is rather perplexing at first until one realizes that humans are merely slightly more intelligent animals.

Sami asked Layla a perplexing question.

Tom asked me a perplexing question.

Tom asked several perplexing questions.

It's certainly a perplexing question.

It's certainly a perplexing problem.

That's certainly a perplexing problem.

Holmes was silent and buried in thought with a pained expression upon his face, as one who finds himself in a perplexing position.

utterly perplexing

perplexing question

perplexing problem

The detective faced a perplexing mystery.

She found the instructions perplexing.