Subcategories

• Week 1

  Modular Arithmetic; Remainders Modulo 3 and 9; Remainders Modulo 2, 4, and 8; Another Modulus

  Day 1

  Day 2

  Day 3

  Day 4
  23
  Topics
  73
  Posts

  G

  I think it meant 1 and 0 as that is what the solution said. Also the problem mentioned writing 'ten' and 'one hundred.' Probably just a typo but it was kind of confusing. Please fix this

• Week 2

  Factors, Trailing Zeroes, GCD and LCM, Euclidean Algorithm

  Day 5

  Day 6

  Day 7

  Day 8
  24
  Topics
  64
  Posts

  P

  Something interesting about this lesson is that this is not marked as a prerequisite. Is this a bug, or is this intentional?

• Week 3

  Repeating Patterns, Chinese Remainder Theorem, Not Relatively Prime, More Remainders

  Day 9

  Day 10

  Day 11

  Day 12
  13
  Topics
  26
  Posts

  

  In week 3's challenge question 19, I am not sure if this is a mistake. The answer, you say, is the number of multiples of three between 1 and 100. But if we take x=3, 3 and 0 cannot have the status of being relatively prime or not because 0 isn't defined to be (not) relatively prime to any number, according to Google searching afterward. So the answer should be 33-1, or 32. Can someone clear things up for me? Thanks a lot.

• Week 4

  Integer Equations, Powers, Divisibility by Seven, Rational Numbers

  Day 13

  Day 14

  Day 15

  Day 16
  15
  Topics
  37
  Posts

  F

  Hi,I was reviewing everything from po shen loh daily challenge ahead of AMC10 and I'm just wondering why on the module 5 day 14 challenge part 3 on the daily challenge has a link that references this page? There's literally nothing on it! (just a quick little observation). 12b87e34-5efe-4715-b344-5d0c52dc4718-image.png