While it has been established that OG questions increase in difficulty, gurpreetsingh's last comment touched on a very important point. I would like to add to his comment. But first, his quote is worth repeating.
Accuracy of number of question is not as important as getting low level questions correct.
Level of the question matter a lot. If you lose easy question you lose more marks than if you lose difficult.
Another point is that if you cannot score well on 600-level questions, then you won't reach 650-level questions. And if you can't reach those, then you won't have the opportunity to reach questions above 700. This is probably obvious to you, but it must be emphasized nevertheless. You must master the lower level questions, completely understand the concepts involved, and have a high accuracy rate.
It's also worth noting that the OG Verbal
book is considered too easy. The OG 12
Edition, however, is better in this regard. But use both.
The most important thing to do right now is to use an Error Log
so you can pinpoint your mistakes and increase your score. Make sure that you read the entire explanation for each and every question that you do.
In terms of how many you should answer correctly, that's difficult to determine. But you need to be very hard on yourself for the early questions.