A good strategy for these types of questions is to write out the first few terms of the sequence to see if a pattern emerges. We have: (-1)^k+1 (1/2^k). I'm a little unclear whether you mean: ((-1)^k+1 )(1/2^k) or -1^(k+1 (1/2^k)). I am going to solve this with the assumption that you maen the forme...

Let's call p_d price of donut and p_c price of cupcake. We know from statements 1 and 2 that: 2p_d = 3p_c -.1 and (p_d + p_c)/2 = 0.35. This is 2 equations and 2 unknowns as far as the price goes. I can solve for p_d and p_c algebraically, and I get p_c = 0.3 and p_d = 0.4. In the case presented in ...

The first thing I did was to put the ratios into whole number form by multiplying both sides of a ratio by the same thing. This preserves the ratio, but makes the numbers a whole lot easier to work with. This gives us a Jan M:F of 9:2 (multiplied by 6), and a Feb M:F of 1:3 (multiplied by 3/2). The ...

Olika, Thanks for catching my typo. I meant to say that n was steeper, not that it had a greater slope. In the case I was illustrating, n had a steeper DOWNWARD slope... thus more negative... thus smaller than p. I edited my original post to illustrate 3 distinct cases, to more explicitly show why t...

Hi Sudhir, Where did you get this problem? I don't think selections is an official way to say combinations. It is somewhat misleading. Also, there are only 4 answer choices to the first problem, and no answer choices to the second, which makes me wonder if this problem came from somewhere besides a ...

Hi Sushi, Whether you should look at a different program depends on your goals post-graduation. If you have looked at the Northeastern program in depth, and if it looks like it will help you get where you want to go, don't get too caught up in rankings, etc. However, if you are worried that the acad...

Hi there, To improve at CR questions, I would recommend taking a look at some non-mathematical logic books. These will help you diagram and pick apart different logical structures. You should be able to find these online or at your local library. I also like listening to politicians speak, and tryin...

Hi Fanatic, I think the best way for you to find out is to take a practice test. Once you know where you are now, you can start planning how you will get to where you need to be. I have seen many test-takers who were not native English speakers do well on verbal (though they had to put more effort i...