Think of a planet. The ghoul will ask 3 questions to determine the planet you are thinking of. All the questions are yes or no questions. Answer each question with a 'yes' or 'no', answers such as 'yup' or 'yep' will be counted as a 'no' answer, so be sure to say either 'yes' or 'no'.
This was made for a school project. I turned of commenting for that reason. Sorry.