Meet David Dallakyan
Shrjan is an independent SAT Math learning website created and operated by David Dallakyan. Its purpose is to make mathematical ideas easier to understand in Armenian, Russian, and English, while helping learners become comfortable with English mathematical vocabulary.
David is a Physmath graduate and a former calculus tutor for university students. He studies Computer Science at the American University of Armenia (AUA) and works as a Cloud Data Engineer.
How to use our material responsibly
- Our public guides, examples, and practice questions are original learning material developed with AI assistance. They are not copied official SAT tests.
- Worked solutions explain the reasoning so you can check each step. An explanation can still contain an error; comparing methods and reporting mistakes helps improve the material.
- Translations help you learn the concepts. Keep practising the English wording as well; a translated practice question is not an official translated SAT question.
- Practice results in Shrjan are learning feedback, not official SAT scores or a guarantee of a future score. For official practice tests and exam information, use College Board and Bluebook.
Corrections and teacher feedback
If you find a mathematical mistake, unclear translation, or misleading explanation, send the page URL, the question or sentence, and your proposed correction. Teachers and tutors are welcome to suggest improvements or share these public pages with their learners.
Independent from exam providers
Shrjan is not affiliated with or endorsed by College Board or Desmos. SAT is a trademark of College Board. Links to official sources identify where to check exam information; they do not imply a partnership.