SAT maths is super easy.
its the english you've got to ph33r
and no, you dont need to study stuff "from 6 syllabuses" >.< (By the way, syllabi, not syllabuses)
its just algebra 1 (v basic algebra) and geometry (simple geometry).
i did IGCSE maths, and got an A*. when i did the PSAT, i had a predicted score of 780/800 in my SAT. i had made one mistake. checked what it was, and apparently, i filled in the wrong answer >.<