Thanks A2A @rohanhanda !

The fact that you didn't have maths in your 12th doesn't matter if you want to pursue btech in computer science abroad. Education in other countries are quite flexible and don't require you to study a particular subject to pursue a particular discipline.

SAT's mathematics isn't tough and anybody who has studied high school mathematics can solve the questions.(8th class level and calculator is available too)

Give few mock tests of the Math test to assess yourself.

Additionally you can purchase the SAT Preparation guide by College Board and McGraw Hill. They are really helpful !

All you have to do is excel in the SAT English part and Indian students excel in maths part anyway.

Apart from SAT, you can appear ACT(American College Testing) which is accepted by several universities. Appearing the TOEFL /IELTS is necessary as English is not our native language.

High scores in SAT and ACT alongside TOEFL and your Board exams will fetch you great Universities in USA,UK and Canada with scholarships .

Read the article below for complete information:-

All about SAT and ACT:-

https://www.google.com/amp/s/www.careers360.com/articles/Universities/Cracking-SAT-AP-ACT/amp

About TOEFL:-

https://www.google.com/amp/s/studyabroad.careers360.com/articles/toefl/amp

All the best:)