JEE Main

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You are not eligible to apply for JEE 2023 because your last chance for appearing JEE is in 2020 since you have completed your 12th in 2018.
It doesn't matter whether you have written JEE in 2018,2019,2020 , you are not allowed to write your JEE in 2023. An individual can appear for JEE for three consecutive years after completion of 12th beginning from the year of 12th completion.
For detailed information go through the JEE eligible criteria data in its website.
There is no age limit for appearing the JEE exam, but you cannot write it after the three years of completion of your 12th board.
So better to try some other competitive exams and plan your career.
Try not to sit and worry about the gone oppurtunity , so rather work hard and test your career in some other field.
All the best!!

There are no exact cut-off marks for JEE Mains exam in any stream of engineering. It differs from year to year and category to category.
The expected cut-off marks are 85-92 for CRL (Common Rank List), 77-83 for Gen EWS, 71- 77 for OBC-NCL,51-56 for SC, and 39-45 for ST category students.
The eligibility for B.Arch admission is 50% marks in 12th class or 50% marks in 10th class and diploma from college which need to be a recognised one.
IIT Kharagpur and IIT Roorkee ar the only IITs which provide B.Arch course . NIT Calicut is the top NIT for B.Arch course. And IIT Roorkee is top IIT for B.Arch course.
You need to get more than 93 percentile in jee main paper 2 to get an admission into a decent institute for B.Arch. There's is no specific rank or mark to get a seat it keeps changing so you need to get a decent percentile whatever the marks may be .

There are some good private Universities in which you can take admission in B.Tech CSE with 49% in 12th standard. As I am associated with Geeta University, I will suggest you apply for the same course at this University. GU offers more than 70+ programmes in Management, Hotel Management, Computer Application, Engineering, Commerce, Fashion Design, Special Education, Pharmacy, Media Studies, Arts & Humanities, Allied Health Sciences, Sciences, etc. Geeta University comes from the lineage of the Geeta Group of Institutions, a giant educational hub with a presence since 1985. University also provides Internship opportunities for us, From the organization where you do internships, an Industry guide is allocated to the intern student and a faculty member from the institution. Monitoring is done by Faculty members on the regular basis with the industry guide to check the progress and performance of the student intern. The curriculum in the CSE branch is very well designed such that we can learn everything from basics to in-depth knowledge of the desired field. The College takes students for an industrial visit for more growth and experience. Placements at GU have always been good, University has set the bar very high due to its record-breaking placements. Computer Science students of GU are working with hundreds of leading IT giants of the world. The 2022 batch from GU saw some big names such as Wipro, Tech Mahindra, Genpact, American Express, Motherson Sumi, Urban Clap, UST Global, Max Life, ICICI Prudential visiting the varsity campus for conducting their campus placements.

Dear aspirant, Glad to see you. List of Colleges for 60-70 Percentile in JEE Main 2022:
Lovely Professional University (LPU) Phagwara
NIMS University - Jaipur
Sanjay Rungta Group of Institutions, Bhilai
Chandigarh University Chandigarh
Xavier University Bhubaneswar, Bhubaneswar
Swami Vivekanand Institute of Engineering & Technology Chandigarh
Pallavi Engineering College Ranga Reddy
Even though one can not make it to NIT, IIIT, or GFTI with a 60-70 percentile in JEE Main there are a lot of popular colleges that accept this percentile range of admission in B.Tech. Different college options are available for candidates who will clear the JEE Main 2022 Exam with a percentile range of 60 to 70. For the 60-70 percentile, the JoSAA rank may exceed 2.5 Lacs. Therefore, candidates securing this percentile range in JEE Mains will have to start looking for alternative options in advance. In some states like Uttar Pradesh, Haryana, Rajasthan, Madhya Pradesh, and Bihar, the B.Tech admission process is based on JEE Mains score, and chances of getting admission are high for a percentile range of 60 to 70. Candidates will need to participate in the state-level counselling process to secure admission. Hope it helps.

If you have these topics in your 12th grade, you can apply for admissions based on your percentages (with Physics, Mathematics and English). You might also receive the most scholarship benefits based on your percentages. I've worked at LPU, so I can attest for their procedures, and I've seen their dedication to students and administration working hard to place students and provide outstanding instruction. Here are a few highlights that I'd like to share with you in order to assist you grow your mindset. LPU is a well-known university that offers high-quality education, cutting-edge pedagogy, and unrivalled national and international placement opportunities. LPU provides its students with excellent academic opportunities. The university has been ranked high by various outer agencies with regard to placements. LPU is conferred with National Employ-ability Award 2020 by Aspiring Minds for the 7th time in a row for having Most Employable Students and being one among the top colleges and universities in India with one of the highest Employ-ability rates. The university provides ample opportunities to each and every of the eligible students to secure good placement. Special inputs in the form of placement classes are given to students to hone their skills and prepare them for placements. The university leaves no stone unturned to shape the future of its students. It is definitely the first choice of both national and international students. All the best!