Greetings! We are starting the thread totally dedicated to math problems and questions you have while preparing for GMAT. Let's solve several problems at first. Data Sufficiency What is the remainder when the positive integer g is divided by 7? 1. When g is divided by 14, the remainder is 8 2. g is ...

It is not quite clear what the problem is. Usually in such a situation people make mistakes because of 2 reasons:
1) they do not pay attention to the question type and its requirements
2) they do not notice some out of scope info or extreme language in the second answer.

Let’s first return to the problem Is t a positive number? (1) –t^2= t^3 (2) t^2 = 1 Though, your 1st explanation was not totally correct, you gave the right answer A. Indeed, Statement (1): -t^2 is either negative, or 0, so t^3 is either negative, or 0 as well. Hence, t<=0. As 0 is neither positive,...

Great, thank you! A couple of comments to your solutions: 1. Expressions (-t)^2 and -t^2 are not equivalent: (-3)^2=3^2=9, but -3^2= - 9. I guess, here you considered the 1st statement as if it were (-t)^2 = t^3. Correct me, if I'm wrong;) One more thing about your explanation: we cannot say, that (...

In general, there could be two possible reasons that might cause such difficulties with DS problems involving number theory: 1. The number theory itself (Make sure that you are familiar with all of its basic principles, and know how and when to apply them). 2. The format of the DS problems (One thin...

Greetings from GoGMAT Team! With this post we are starting a series of GMAT-related articles that should help you understand GMAT better and hopefully improve your score. Read all our previous GMAT preparation blog posts. Should you have any questions related to the GMAT preparation, do not hesitate...