gmat210minutes

Any other explanation for this question, without squring the abs value? thanks G

In Situation 1, x - z is negative and so |x - z| = z - x: In Situation 2, x - z is positive and so |x - z| = x - z Can someone explain me in detail, how to approach absolute value above. In the above example I can understand after seeing and plug-in some numbers that |x-z| = z-x. Please help me to find a way to get these concepts clearly and quickly. Thanks G

Thanks a lot - I missed that part. Hopefully I am more careful in the real test and get my objective score of 650+. G

Question - How stmt 1 is sufficient? From 'a' it says if x is in X, then 1/x is also in S. But it does not say if 1/x is in S, then X is also in S. so 3 may be in S or 1/x is there by itself in S. Please clarify

Hi tamGmat, Is the math tougher than GMATPrep. If so, what areas are tougher. Can you throw some light on it. I re-appearing for the exam next tueday and I am getting somewhere 46 - 48 in Math with around 10-12 mistakes. I am trying to get the number of mistakes to below 5. Your comment will help to prepare for the more tougher math questions. Thanks G

I have a question about A eventhough that answer sounds better. The non underlined part of the sentence uses their descendetns ... had migrated. Here why it is using a past perfect? Release is the first action and decendents migrated is the second action. Please someone help - 800Bob if can answer that would be great. Thanks G

the postive integers x, y and z are such that x is a factor of y and y is a factor of z. is Z even? 1) xz is even. 2) y is even Please expalin your answer in detail Thanks

can someone explain this anwer in detail - not clear at all. please help. Thanks G can someone explain this anwer in detail - not clear at all. please help. Thanks G [ quote=nuthan]In the xy-plane, line l and line k intersect at the point (16/5, 12/5). What is the slope of line l? (1) The product of the slopes of line l and line k is -1. (2) Line k passes through the origin. no oa opted D

someone please explain the step-3 below. Thanks G

Can someone explain what is the best way to solve this problem? Thanks G

sqrt[2sqrt63 + 2/(8+3sqrt7)] = ? a) 8 + 3sqrt7 b) 4+ 3sqrt7 c) 8 d) 4 e) sqrt7 Please show your workings. I am totally lost in this problem. thanks G

From a group of 3 boys and 3 girls, 4 children are to be randomly selected. What is the probability that equal numbers of boys and girls will be selected? A) 1/10 B) 4/9 C)1/2 D) 3/5 E) 2/3 Thanks G My answer is A. Why it is incorrect? My working as follows: 3C2/6C2 = 1/5 - selecting 2 boys 3C2/4C2 = 1/2 selecting 2 girls from the rest 4. So overall prob = 1/5*1/2 = 1/10. Thanks

99,999^2 - 1^2 = 10^10 - 2 (10^5 – 2)^2 10^4(10^5 – 2) 10^5(10^4 – 2) 10^5(10^5 – 2) Please explain your answer. I solved the problem. would like to see any short cut. Thanks G

Hi All, I understand up to 60 degrees. After that I cannot understand, how to get 4. Can someone please put a picture and help on this question. Thanks G

Congrats on achieving your score. You compared the real Gmat Quant Questions with GmatSets. Can you eloborate little bit more on that? Thanks G