1) SQA Highers: BBBB or more if two sittings including two of Biology, Chemistry, Mathematics, Physics. Standard Grades: Chemistry at Grade 2, Mathematics at Grade 1 or Mathematics and Physics at Grade 2 or Mathematics Higher at Grade C, English at Grade 3, and a language other than English at Grade 3.
2) GCE A Levels: BBB including two of Biology, Chemistry, Mathematics, Physics. GCSEs: Mathematics at Grade A or Mathematics and Physics/Science plus Additional Science at Grade B. Chemistry/Science plus Additional Science at Grade B if no Chemistry at A Level, English at Grade C, and a language other than English at Grade C.
3) IB: Award of Diploma with 34 points overall and grades 555 in HL subjects with two of Biology, Chemistry, Mathematics or Physics. Standard Level: Chemistry at 4, English at 4, a language other than English at 4, and Mathematics at 5 or Mathematical Studies at 6.