Another interesting problem from a recent HS math competition. (Geeks only.)
College Hill Coaching
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College Hill Coaching is the premier provider of SAT, SAT Subject Test, AP, SSAT, ISEE, and academic tutorial in the northeast. Founded by Christopher Black in 1989, we have tutored thousands of students in writing, mathematics, and science, and have authored five of the best-selling guides to SAT and PSAT preparation including "McGraw-Hill's SAT," "McGraw-Hill's PSAT," "Conquering the SAT Writing," and "12 SAT Practice Tests."
04/15/2020
My latest book, "Conquering the SAT Writing and Language Test and Essay," will be on the shelves in June, but you can pre-order today on Amazon!
McGraw-Hill Education Conquering the SAT Writing and Language Test and SAT Essay, Third Edition McGraw-Hill Education Conquering the SAT Writing and Language Test and SAT Essay, Third Edition
07/03/2019
A paean to precalculus. Hundreds of mindlessly and monotonously rotating clock hands, carefully chosen, can produce your portrait. Mesmerizing especially for those of us who only ever saw Fourier Series as hard-wrought, lifeless formulae.
Pure Fourier series animations for 12 oddly satisfying minutes Because why not? Main video: https://youtu.be/r6sGWTCMz2k If you're curious about the number of vectors used for each animation: - Eighth note: 100 - Sigma: ...
06/18/2019
If you were wondering about SAT vocabulary...
How did studying for the SAT affect your vocabulary as an adult? Christopher Black's answer: I took the SAT three decades ago, when it was still a strongly vocabulary-based test that included antonym (e.g. What is the opposite of clandestine?) and analogy (e.g. DRONE is to INFLECTION as (A) shriek is to screaming (B) thunder is to subtlety (C) hush is to encou...
05/20/2019
For any physics students who were wondering...
What's the difference in physics between "Potential Energy" of a system and a "Potential"? Christopher Black's answer: It’s the difference between you standing on a mountain, and the mountain itself. If you stand on the top of a mountain (let’s say it’s snowy and you’re wearing skis), you have potential energy because you’re higher than your surroundings in a gravitational field...
05/20/2019
A little last-minute advice for anyone taking the SAT Mathematics Level 2 Subject Test in June!
How do I score 750+ in SAT Mathematics Level 2? How do I avoid silly mistakes? How do I get a perfect score in 10 days? Christopher Black's answer: I don’t know your problem-solving habits, so I don’t know precisely what kinds of “silly” mistakes you make. The mistakes students call “silly” can include many different kinds of things: mis-reading the question, not paying attention to negatives, second-gues...
04/18/2019
Just one more month until SAT Elite 2020 hits the shelves! Over 100 "elite" tips and questions for students shooting for a top score (1500+). You can pre-order now!
McGraw-Hill Education SAT Elite 2020 Ace the SAT with this essential study guide packed with skill-building techniques, practice tests, and interactive features With more than 125 years of experience in education, McGraw-Hill is the name you trust to deliver results. This essential guide is the most comprehensive and relevant p...
09/05/2018
Buy our latest SAT guide now or call us for information on one-on-one tutorial!
McGraw-Hill Education SAT 2019 Improve your score and ace the SAT with this essential study guide packed with targeted instruction and valuable practice tests With more than 125 years of experience in education, McGraw-Hill is the name you trust to deliver results. This MHE guide is the most comprehensive and releva...
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