Sentence examples for unsolved problem from inspiring English sources

THE RIEMANN HYPOTHESIS The Greatest Unsolved Problem in Mathematics.

"That sounds like an unsolved problem". So is that it?

Pain control during this procedure is still an unsolved problem.

Welsh told Minsky that one unsolved problem was how the nerves in a crayfish claw worked.

The unsolved problem for lighting Africa isn't designing a great lamp.

Bridgers stored the CDs on a shelf and filed the project away as an unsolved problem.

That may be, but it is also damning evidence of an unsolved problem.

In the future, equipment operators may work in sealed cabs, but communication is an unsolved problem.

Unsolved problems remain.

37. Unsolved Problems in Photobiology.

Despite this, many unsolved problems still remain.