ThisI still don't get why you would do a question with no working though. What, do you write your working out on the exam paper? They give you answer books for a reason. You are going to have write stuff down to arrive at your final answer, you can't just do it all in your head. You might as well write what you are doing in the answer book so the markers can see.
Thanks for your help. Sometimes there might be a question where you're unable to manipulate the equation to find an x-value or something, but you can sub in educated guesses and it turns out to be correct.I still don't get why you would do a question with no working though. What, do you write your working out on the exam paper? They give you answer books for a reason. You are going to have write stuff down to arrive at your final answer, you can't just do it all in your head. You might as well write what you are doing in the answer book so the markers can see.