tiptop

Concerning the question above it is not the worst way;)

Most important: Stay calm. 740 are manageable in a relaxed way. Take your time for the heavy questions, if you cannot solve a question, guess and do not spend too much time on it. Good luck & See you in September

The number of integer from a to b (a,b exclusive) = b - a - 1 Many, many formulas till now...

I'd say 10 (If the question says "more than 3/8 of all his dollars are australian). X is the number of all his Dollars Let's assume A has exactly 3/8 of his Dollars as Australian Dollars. So: 6*C=X*(1- 3/8) -->X=48/5 = roundabout 10. Test: 4/10>3/8? 32/80>30/80 (to compare the fractions we need the same denominator) --> correct! If you assume only 3 Australian Dollars, the "more than 3/8" condition is not fulfilled. Can you follow me? In GRE questions, I am not the greatest explainer on earth.

I really hate the language they use... for my understanding they meant 2,3 or 4 Es, which makes it even more complicated. Riyad, you mean it is harder than GRE or easier than hard GRE? Permutation comes up from time to time...

I really can understand that you are tense now! You are definitely right, that only the heaviest questions are posted, so don't worry and just try yourself at PP. Moreover, there are several questions in powerprep, what means that every time you do it you should get at least some new questions. To rank yourself, there are more tests from other authors. Barron's includes 5 Tests incl. 2 CAT on CD Rom, then there is 800score.com which offers one test for free and helps you getting to know yourself concerning the test. Perhaps you'd answer me the question, which score you need? Edit: And sorry, it is not possible to say, which score 3 days later would represent your score in the GRE. That's why it depends on how many questions you remember how well, how nervous you are on testing day etc. My GRE is on Monday, if you like I will try to compare PowerPrep and the real test afterwards...

Angle AOB is not only the biggest, it would be the biggest also with eg 80 or 70 degrees. If you'd have only the restriction, that the angle is the greatest, then you'd be right with your explanation. But the limitation is even stronger: Not only biggest, but bigger than 90. Therefore you have no other possibility than to find out what is the least measure of the side, by pythagoras you yield AB>sqrt50, which is bigger than 7..etc.pp.

If two trains are 120 miles apart and drive toward each other with 30 resp. 40 mph, how far will they be apart one hour before meeting? CA: 70 My Approach: R=d/t; t (meet) is the same, so: l d/30=(120-d)/40, solving for d, then calculating the time both have driven when the meet, minus 1/2 is t one hour away yields in a very complicated way the wrong answer!!

mea maxima culpa... deichgraf scores;)

Thanks Riyad. It is a logical explination, but I wouldn't have expected such a "complicated" way of thinking...how would you rate this question above all GRE questions? The point is, I have my GRE on monday and need 740 in the Quantitative Part. The last three weeks, I nearly only prepared with Barron's, Kaplan's and Nova's. Questions like the above one were really rare in tat books, and I am a little shocked at the moment and not sure, whether I have the least chance..?!

Given f(n) = (-1)^n *c*n, where c is the cost. If f(1), f(2), f(3) are similar functions and the difference between the largest and the smallest among f(1) f(2) f(3) is 20, then Col A: f(4) Col B: 16

I'm not sure which way you do it and therefore is too time consuming for you. I'd do it like this: prime-factorization for 28: 2,2,7 prime-factorization for 16: 2,2,2,2 the two is in both, so you just need to multiply 16*7=114. all multiplys of 114 are divisible by 28 and by 16, less than 300 is 114 and 228. This still requires a little calculating, but with a little training you are quite fast.

Is it asked how many different prime factors they have in common, or how many prime factors in the whole they have in common? Because the 2 is twice in both of them, so the question is, whether the answer is 2 or 3...?

A chef prepares a pound of lamb for every 3 guests, a pound of beef for every 4 guests and a pound of ham for every 6 guests. Totally he prepares 36 Pounds of meet. How many guests come? CA: 48

aaah, right! Thanks a lot. Once you know it is recursively, it isn't the least bit of a problem... Thank you, walt!