to find the answer or explanation for; clear up; explain

to solve the mystery of the missing books.

to work out the answer or solution to (a mathematical problem).

verb

pose , question , search , wonder

verb

break * , clarify , clear up , construe , crack * , deal with , decide , decipher , decode , determine , disentangle , divine , do , elucidate , enlighten , explain , expound , fathom , figure out , find out , fix , get , get right , get to the bottom , have , hit , hit upon , illuminate , interpret , iron out * , lick * , make a dent , make out * , pan out * , put two and two together , puzzle , reason , settle , think out , unfold , unlock , unravel , unriddle , untangle , work , work out , dissolve , resolve , undo