add up answer be OK be correct be just right be right bottom clear up crack debug decipher decode disentangle divine do dope dope out explain fathom figure out find out find the answer find the solution get get right guess guess right have it hit it interpret make out open the lock plumb psych psych out puzzle out ravel ravel out resolve riddle solve sort out undo unlock unravel unriddle unscramble untangle untwist unweave work work out