GMAT/GRE - Math Discussion

[anam]

Dear Attendees,

Both for the teachers and the students, it is a must to sit for GMAT/GRE exam for higher education. This post is created in a view to discussing mathematical problems and related queries. I expect everyone's spontaneous participation and brain-storming.

Sayedul Anam and
Reza Shahbaz Hadi
Lecturer
Department of Business Administration
Faculty of Business and Economics
Daffodil International University

[anam]

For GRE, Everyone can remember in this funny way............

[Reza S. H.]

good one indeed to remember the trigonometric formulation. From my point of view, such theorems will be helpful in GRE exam instead of GMAT. Truly speaking, such funny but informative ways help exam candidates memorize things in an effective way.

[Adiba_Anis]

Good initiative.
Can you also mention  if there is any need of SAT?
 

[anam]

Column A                                       Column B
   -3^4                                         (-3)^4
 
A)  Column A’s quantity is greater.

B)  Column B’s quantity is greater.

C)  The quantities are the same.

D)  The relationship cannot be determined from the information given.

Please give the answer:

[Reza S. H.]

Column A results in -81 and Column 2 results in 81. Thus B is the answer as the column B is greater.

[anam]

x and y are integers: lxl=y

Column A        Column B
x                         y
   


 
A)  Column A’s quantity is greater.

B)  Column B’s quantity is greater.

C)  The quantities are the same.

D)  The relationship cannot be determined from the information given.
Please give the answer:

[Reza S. H.]

well, here i must say E. The absolute value of X indicates that X could be both positive and negative. Thus it cannot be determined whether X or Y is larger.

[anam]

Sorry, Hadi sir, here x can accept any integer (positive and negative), but y take only positive value.
So elements of x is greater than y.
So answer is A.

[anam]

If 25 students in one class had an average of 93% and 20 students from another class had an average of 98%, approximately what is the average in percent of all 45 students?

 
A)  94

B)  97

C)  95.5

D)  95.2

E)  93

[anam]

Ans is C
93% of 25=23.25
98% of 20=19.6
Total=42.85 is present out of 45
So 95.222 is answer

[Reza S. H.]

why did you post the answer? let us try first Sir.

[tree]

sir many student did not complete this program in this position we don't understood this program .

[anam]

Ok Hadi sir. Next Time I do not provide answer.

[anam]

Dear Tree

I know this is very hard for the student. But you have to know that it is GRE/GMAT section. So you have to give more concentration to solve the problem.

I want to give thanks to you for interest. Go ahead. If you face more problem then you can come to my room (Faculty 2, Prince Plaza). I think it would help you for your improvement.

Best Regards
Sayedul Anam