Still, he had to come up with an answer of some kind.

More likely to come up with a wrong answer than a right one, and, either way, he couldn't be certain.

She gave them time to come up with an answer.

She'd hav$ to come up with a pretty good answer.

He couldn't have come up with a better answer himself.

I've been doing a lot of thinking about you since last night, and I may have come up with an answer or two.

She still hadn't been able to come up with an answer.

He'd asked a question and come up with an answer.

He didn't have to think for very long to come up with the answer.

Only a few have come up with the right answer.