Anagrams of: ELOPRU__

• a particularly baffling problem that is said to have a correct solution

• a game that tests your ingenuity

• be a mystery or bewildering to

• be uncertain about; think about without fully understanding or being able to decide

• a duplicator (trade mark Xerox) that copies graphic matter by the action of light on an electrically charged photoconductive insulating surface in which the latent image is developed with a resinous powder

• a copy made by a xerographic copier

• reproduce by xerography

• a small hill rising up from the African veld

• the 19th letter of the Hebrew alphabet

• Neither reflecting nor emitting light.

• Allowing little light to pass through, not translucent or transparent.

• Unclear, unintelligible, hard to get or explain the meaning of

• Obtuse, stupid.

• Describes a type for which higher-level callers have no knowledge of data values or their representations; all operations are carried out by the type's defined abstract operators.