Yet, on simpler challenges, the technology's performance is improving and business has been growing.

With Bradwarden, though, it was a simple challenge of hit or miss.

Afraid that what you see as a mere girl can best you at a simple challenge?

So he had set her a simple challenge, and she was being too intellectual about it.

There, and in airports all over the country, the concerns were more narrowly focused on the simple challenge of reaching a destination.

Now it will be a matter of simple challenge, and threat.

"I am issuing a simple challenge today," he said.

What had seemed a simple challenge at first was rapidly becoming a major exercise.

If he challenges our estimate of how much tax he has dodged, then I put to him a simple challenge.

The simplest challenge is for the United States to sustain its strong growth rates.