difficult

  1. W

    Maths: PII questions

    Having solved the past papers multiple times, that nothing seems challenging to me anymore, I was looking for some really tough questions for the following topics: -Everyday Mathematics - Algebra -Functions -Graphs -Number Sequence -Co-ordinate geometry -Inequalties. Please note that the...
  2. Z

    Difficult mcqs compiled for Chemistry A level

    Hello everyone, I am looking for a compilation of a level chemistry (9701) mcqs till 2015 at least, since i don't have much time to practice all the past papers. I had seen a thread of difficult mcqs for physics but couldn't find one for chemistry. Help would be sincerely appreciated. Thanks...
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