Hi aspirants

12 marks are also matters . some of the eligibility for studying aboard
At least 60% of the marks is required. And for the Master's degree, the required is above 60% in the undergraduate degree. Some country also take SAT score. And for proficiency they take TOFEL and IELTS

The Documents you need to submit asked by most of the colleges

• Passport photos for identification
• A statement of purpose
• CV/résumé
• Academic references/ letters of recommendation
• Certificate and transcripts of your secondary education
• Proof of English-language proficiency (e.g. a TOEFL/IELTS certificate, for schools in English-speaking countries), or other language test
• Admissions test results (e.g. GMAT/GRE results, for graduate programs)

Hope this Helps

Good Luck!