how much marks will i need in snap to convert scmhrd

38+. But don't go for marks like everyone. It can be more than 38 or less than 38 depending on the exam difficulty level. Just give your best in exam. That's all matter the most.

Given that a and b are integers and that 5x+2√7 is a root of polynomial x^2-ax+b+2√7in x

It seems there is a discrepancy in the question. I guess marks were awarded for everyone. Cracku says the same( being a 2019 XAT question).

Can someone please help me with Language Skills section in NMAT ? How to prepare ?

I just gave me NMAT last night, and you should know that it's all about speed. There are 2 RC passages in between, and since you can't skip a question, and you can't go back to change an answer, you have to go through the rest of the questions quicker. The plus point is that most of the others are parajumbles, fill in the blanks, and word relations. For parajumbles, just pick the options, mostly, the first line and last line, which will help eliminate wrong answers, and get you the answer quickly. For fill in the blanks, just solve the blanks which have unique answers in all options. Word relations are hit and miss, even if you understand the relation in question, you might get confused because of a word you might not know. So, just try to find a similar relation in the words you know, and only choose the unknown option, if none match. RC passages are thankfully not very hard, so try not to get stuck on them. 28 minutes pass very fast, if a question is not clicking, just click your best guess and move on, even giving 2-3 minutes on a question can reduce your overall score.

@Tejaswi, in terms of preparation, you don't need to prepare too much after CAT because this is definitely easier, so Study Room material should be sufficient, what you need to prepare for is the type of questions. You need to prepare yourself for using the options because all questions are MCQ type. So, whether for parajumbles, fill in the blanks or word relations, you should always go in the direction of options, don't try to get the answer by yourself, just use the options as much as you can. More often than not, the answer will show itself within seconds if you just match all of the options with the question. Also, just because you can't return to a question, doesn't mean you have to reach an answer to every question, even if you know that you can. Time is key. Just make a good guess and move on. I think I lost a few questions in Quants section at the end which were easy, because I just had to solve that one question that had a lot of calculations about simple and compound interest in the middle. Quants still gives you some time, VA doesn't. The passages especially take up a lot of time, so make sure you are keeping track of time, so that you can reach the end, and answer the simpler questions after the lengthy passages.

I got a score of 243 in my NMAT. (71/85/87). But I got 71 in quants. Should I go for re-take ????

It's a safe overall score. Wait for probable cut-offs in Jan. Since many of them have scored comparatively lower in quants the cut-off might be less for that section.