Harim Yoo

The Essential Guide to IGCSE Harim Yoo

The Essential Guide to IGCSE: Additional Math is a guidebook for students to prepare IGCSE: Addmath(0606) tests. This edition covers topics for 2017-2019 coursework, containing 189 practice problems including all answer keys. Covering 19 topics including Calculus and Vectors, this book is primarily designed to supplement the online lecture by the author at Masterprep in South Korea. However, it also contains good-quality questions for quick revision before the IGCSE (0606) test. he author, Harim Yoo, graduated from Northwestern University (B. A. in Mathematics) in 2012. Harim also served in the ROK/U. S Army as a KATUSA sergeant in the 2nd infantry division from 2012-2014. Since his ETS from duty, he found his passion for teaching and educating bright students. He gradually developed his career as a lecturer at Masterprep and has now been recognized as one of the leading lecturers in Apgujeong, Seoul. Harim is currently dedicating his time to produce mathematical prep-books for junior high/high school students to simplify learning methods to effectively learn the core concepts and problem-solving strategies, writing on the bulky series called "Essential Math Series."

(Update 2021.11.05) The Essential Guide to IGCSE Addmath (1st edition) (AMAZON version) Errata

p.18 4. (a) 22-x, x+13, 15-x, respectively
p.26 4. (-6/5, 7/15)
p.26 7. (3/2, -7/10)
p.26 8. 6 and -2 ( (6, -2), (-2,6) are redundant.)
p.26 9. (1, -1) is redundant.
p.43 7. 1/8 into 8
p.43 x=0 as well. (x could be 0 before we take a log.)
p.58 2. ''k>10 or k=10'' or "kp.58 4.(b) c=15/4
p.58 8. reverse inequality signs to different directions.
p.76 Switch -d into d in the inverse matrix.
p.78 3. 7
p.86 2. (b) 3:4
p.92 3. (b) b=-7/2
p.102 3. (b) sqrt(x+3/2)+2
p.102 5. (b) y=ln(4x-1)
p.130 (a) -sqrt{5}/2 (b) sqrt{5}
p.132 27. eliminate the last approximate.
p.143 3. 16P8
p.154 9. add "y=11x-25"
p.161 1. 196/9
p.168 4. x=3/2, y=4
p.178 6. add "+C".