I found a solution, but I found it so fast that it can't be the right solution.

Do you really need to ask the question to know the answer?

He took a slight hint as the start and found the correct answer.

History presents us with many different answers to each question.

It is clear that he knows the answer.

As soon as we get the answer, we'll phone you.

She may have known the answer.

Her answer was incorrect.

Her answer was straight out of the textbook - nothing interesting.

I noted that her answer was incorrect.

He was so confused that his answer did not make any sense.

He found out the answers for himself.

He hit on the answer to the problem as he was having lunch.

He guessed the answers with great accuracy.

He came up with an answer to our problem.

He gave a positive answer to my question.

He whispered the answer in my ear.

He took it for granted that I knew the answer.

He made a positive answer.

He knocked at the door again and again, but there was no answer.