There's a lot of filler in that question to make it sound more complicated, but all we're really being asked is what is the probability that she picks two numbers correctly. We know that each number is greater than 5, meaning they could only be 6 7 8 or 8. So there is a 1 in 4 chance she'll pick eac...

Because the function of h(100) is equal to the product of all evens between 2 and 100, inclusive, and because we need to know the smallest prime of h(100)+1, and because we already know that any two consecutive integers are co-primes and therefore don't share any factors except for 1, all we need to...

Man, I hate this problem! I saw it a few weeks ago and it took me over an hour of research (particularly on BTG) to finally understand it. I'm praying I get something like this on my GMAT, though, as I get it inside and out now! Anyhow, the single most valuable piece of info you need to understand i...

No problem, Moe. PM me if you get stuck.

another way to think about this by using the 12 oz = 1 can clue. we know we need 1 can OJC + 3 cans water to make OJ, which makes we can make OJ in batches of 48oz. then we ask, how many 6 ounce cups of juice can you get out of 48 oz of OJ? 48/6 = 8. so to solve for how many 48oz batches of OJ you n...

BTG practice question -- sets

Another BTG question I'm not so sure about re: phrasing. K is a set of integers such that i) if x is in K, then 2x is in K ii) if each of x and y is in K, then x + y is in K Is 15 in K? (1) 1 is in K. (2) 3 is in K. OA is D . I saw the potential for that answer, but I also thought, "hmm, maybe ...

Anshumishra, I thought C at first, too, but then I went back and tried to plug in numbers using just B. Since we're looking for the GCF rather than two individual values, in every case, the GCF of x and y was 1. But you're saying that, because statement 2 leaves the possible x and y values infinitel...