Hmm. Depends. Did you have strings of wrong answers? How many in a row and where on the test were they?
Quote:
In 50-60% of my wrong CR questions, i am always confused between 2 choices and i end up selecting the wrong one.
That's about what you should expect, right? If you have 2 answers left, you have a 50/50 shot. You guess... and you get about 50% wrong. :)
You can save time by guessing faster. My guess is that you spend at least 20-30 seconds agonizing between those last two. As a general rule, when you've narrowed to 2 answers, look at each answer ONE more time, then pick. You're getting half of them right already, so get them right faster! (And the wrong ones wrong faster.) Then you'll have more time at the end.
What have you been using to teach you how to get better at CR? I'm not talking about OG or practice problems. I'm talking about lessons that tell you "Here's how you recognize a Weaken the Conclusion question. Here's how you answer Weaken questions. Here are the common traps in Weaken questions." Etc. If you haven't been using anything that actually teaches you this stuff, now's the time to find something and start using it!
Re: MGMAT tests (or GMATPrep, actually), You can still take both with repeats as long as you follow a few guidelines to minimize the chance of artificially inflating your score via question repeats. First, anytime you see a problem that you remember (and this means: I know the answer or I'm pretty sure I remember the answer, not just "hmm, this looks vaguely familiar..."), immediately look at the timer and make yourself sit there for the full length of time for that question type. This way, you don't artificially give yourself more time than you should have. Second, think about whether you got this problem right the last time. If you did, get it right again this time. If you didn't, get it wrong again. If you *completely honestly* think that you would get it right this time around if it were a new question (even though you got it wrong last time) because you've studied that area and improved, then get it right this time.