As per the information given in the NATA brochure you need to score a minimum of 50% marks in your 12th class exams with mathematics as your compulsory subject to apply for architecture colleges.

Answering to your second question

based on the total score you get ( 50% of 12th score + 50% of NATA score), ranks are given.I hope you got the answer.

Escalators are used for vertical cum horizontal movement. e

Elevators are used for vertical movement.

Effective strategies and techniques for preparation of Mathematics Topics.

1. Knowing the key concepts - Make sure your basic concepts of math are strong enough and learn all the formulas, identities and tables.Try to solve small calculations without pen-paper as it can improve your thinking and consume your time. Memorize area formulas for 2-Dimensional and 3-Dimensional figures. Focus on algebraic and Indices formulas. Remember important T-ratios (in Trigonometry) and their values. Remember Pythagoras Triplets.
2. Play with your strengths - Firstly, try to master all the topics that you are strong in, and later work on the weaker topics(by practicing more question).
3. Prepare your own notes - Make your own short cut tricks and notes, as self-prepared notes are the best trick to memories any subject.
4. Revision of errors - Errors give you an idea of knowing where you have done mistake. These let you understand and review the thing that left you back. This is also once again a kind of repetition and a practice.
5. Practice the questions based on each topic within the time limit provided(on edge.dqlabs.in). Also, go through all the past year papers and solve them thoroughly. Practice more and more. Try to attempt as many mock tests as possible. When you are left with handful of days to go, nothing will help you more than writing and analyzing Mock Tests.
6. Be confident with your preparation. While sitting in the exam, never pressurize yourself with time factor during initial stages – try to solve each question within 60 - 90 seconds of time. Read, understand and analyze the question/given data carefully and then solve.

1. There no shades and shadows in 2d.

2. 3d parameters: Highlight, light shades, medium shades, dark shades and shadow. Shadow should cast behind the object.

it's called MATRI MANDIR not maitri mandir

this slide share article will provide you with enough information-

https://www.slideshare.net/arathyprasad/matrimandir-46972984

https://en.wikipedia.org/wiki/Matrimandir

the twelve petals of matri mandir-

https://www.auroville.org/contents/2141

https://web.archive.org/web/20050404020613/http://auroville.org:80/thecity/matrimandir/mm_symbolism.htm

for additional information please refer these links-

https://www.auroville.org/contents/2084

https://worldarchitecture.org/architecture-news/cvcep/a_modern_temple_for_all_religions_roger_angerdesigned_matrimandir_in_auroville.html

https://www.auroville.org/contents/678

technical info about matri mandir-

https://www.auroville.org/contents/685

http://www.archinomy.com/case-studies/1968/matrimandir-auroville

here is a vimeo link-

https://vimeo.com/44315540

in this year mock test provided by coa at tcs website their were no english questions so i guess w'll not find in the main nata paper too.