Subcategories

• Day 5

  Factors

  Module 5 Day 5 Challenge Part 1 Module 5 Day 5 Challenge Part 2 Module 5 Day 5 Challenge Part 3 Module 5 Day 5 Your Turn Part 1 Module 5 Day 5 Your Turn Part 2 Module 5 Day 5 Your Turn Part 3 Module 5 Day 5 Your Turn Part 4
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  M

  @daringhorse i think you meant 3^0+3^1 and 5^0+5^1 right, i just want to check

• Day 6

  Trailing Zeroes

  Module 5 Day 6 Challenge Part 1 Module 5 Day 6 Challenge Part 2 Module 5 Day 6 Challenge Part 3 Module 5 Day 6 Challenge Part 4 Module 5 Day 6 Your Turn Part 1 Module 5 Day 6 Your Turn Part 2 Module 5 Day 6 Your Turn Part 3
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  L

  The question at the end of the video is "For how many values of n is rounding down of n/5 equal to 28?" If n is any real number in the interval [140,145) then this particular n would satisfy this question. Thus, the answer should just be infinity, for there are an infinite number of ways to satisfy n being in the range of that interval.

• Day 7

  GCD and LCM

  Module 5 Day 7 Challenge Part 1 Module 5 Day 7 Challenge Part 2 Module 5 Day 7 Challenge Part 3 Module 5 Day 7 Challenge Part 4 Module 5 Day 7 Your Turn Part 1 Module 5 Day 7 Your Turn Part 2 Module 5 Day 7 Your Turn Part 3
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  Q

  @amusingminnow These types of problems are tricky -- it's asking that given \(\frac{\text{lcm}(a,b)}{\gcd(a,b)}=b \), which of the options must be true. So the only thing we know that's true for sure is that \(\frac{\text{lcm}(a,b)}{\gcd(a,b)}=b \).
  We can't just assume that \(a=b^2\), because the problem never told us that! It just so happens that if \(a=b^2\), then the requirements are fulfilled. But, \(a\) doesn't have to be equal to \(b^2\). For example, \(a=9,b=6\) works.

  Make sure that when you're doing these problems, start with the given, and then find what must be true using only the given. Using that, you get that the fifth option is the right answer. If you want to look at the thread for the solution you can find it here: https://forum.poshenloh.com/topic/724/confusing-solution/2
  Hope this helps!

• Day 8

  Euclidean Algorithm

  Module 5 Day 8 Challenge Part 1 Module 5 Day 8 Challenge Part 2 Module 5 Day 8 Challenge Part 3 Module 5 Day 8 Challenge Part 4 Module 5 Day 8 Challenge Part 5 Module 5 Day 8 Your Turn Part 1 Module 5 Day 8 Your Turn Part 2
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  P

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