As you finished all the beginning level problems, you should have an idea on what to look for and develop some basic strategies for this type of questions. You will probably expect the problems in the intermediate section to be a little bit harder, but the strategies you need to use to solve them will generally be the same. Some questions may even require you to "create" clues that aren't included in the questions. You will then need to carefully find out the relationship between important elements that hasn't mentioned in the problems. You can also use alphabets to replace the names of some important characters in the questions. It will help you to draw some simple picture to figure out the relationship between them.