Hi Prof’ I am so grateful for vour videos I didn't prepare early for my igcse but a few weeks before my exams I found your Chanel and binged watched most of your videos it helped a lot lam got an A in maths extended And I was honestly expecting a C
Ur videos are really helpful literally half of the syllabus couldn't understand as an ig student going for 2023 m/j but because of u everything is clear thank u so much so infinity much ❤ btw answer for last question is 4900 km 😊