figure out,
puzzle out,
solve,
lick,
work out,
work find the solution to (a problem or question) or understand the meaning of; "did you solve the problem?"; "Work out your problems with the boss"; "this unpleasant situation isn't going to work itself out"; "did you get it?"; "Did you get my meaning?"; "He could not work the math problem"
mix up,
stump remove tree stumps from; "stump a field"
riddle set a difficult problem or riddle; "riddle me a riddle"
elude,
escape escape, either physically or mentally; "The thief eluded the police"; "This difficult idea seems to evade her"; "The event evades explanation"
