2 Quick Questions

Hi Brent, I would appreciate it if you answer these two questions. First one: In the video 12 of Integer Properties, you mention one useful rule for divisors. "If jk is a divisor of N, then j is a divisor of N and k is a divisor of N." Just a few days ago, I came across this DS question, w...

A Few Questions

Hi Brent, I have a few questions, so I start with the first one. In the video 38 of Integer Properties module, we have a DS q. You don't rule out the first statement because you say 5J should have prime factorization of 5*?*?*?*?, and 3k should have prime factorization of 3*?*?*?*?. And since the fi...

Video 38 Of RC Module

Hi Brent! I have a quick question regarding the video 38 of RC module. The video is a RC question about cyclists. I think I really understand the somehow quantitative logic that we need in order to solve the question (I'm talking about the part that you explain the scenarios for cyclists involved in...

First of all, on the OG13, it doesn't say, "age, in which" and "a time, when". It says, "an age in which" and "a time when". Please refer to the mentioned questions on my post. Then, isn't 'an age' also 'a time'? So, if we can say, "an age in which",...

Actually, your way of solving this question is quite correct ....and after all, it's such a simple question. I don't know why I was trying to sophisticate the problem and came here and asked those stupid embarrassing questions that have nothing to do with this easy question at all

Hi, Using the combination formula, we will know how many groupings of 2 of these 4 expression we can have:4!/(4-2)!2!=6 So, now, let's see how many of these 6 combinations are of the form of (x^2)-[(by)^2], which is (x+by)(x-by)... (x+y)(x+5y): it's not of the form of (x+by)(x-by), so NO (x+y)(x-y):...

Mitch, thanks for your solution, but I was trying to understand the logic behind this easy question more. I mean, let's say you decide to check this new cloths store in the town today. You end up buying a pair of jeans for $20. Then, the very next day, you go to this cloths store again and decide to...