your question is how can u understand world problem
The very first thing is that read the question
Reading the questions doesnt mean that just looking at it and staring but you should the question line by line. still if cant understand try to read in your own language
And my suggestion is that before going for exam you should be well prepared all the world problem given in text and you can also refer to the net for extra questions. practice more and more as you can
And when you are reading the word problems . your concepts should be clear like a diamond like you should know from which chapter it is etc
