GMAT/GRE - Math Discussion

[anam]

What is the area of a circle that is inscribed in a square whose area is 81 square inches?

 
A) 81 pi square inches

B) 18 pi square inches

C) 9 pi square inches

D) 20.25 pi square inches

E) 40.5 pi square inches

[anam]

Being a conscientious driver, Suzy stayed at or below the speed limit while traveling down the interstate.  Overall, she went an average rate of 65 mph and it took her 10 hours to complete her journey.  If she traveled for 6 of her 10 hours at 70 mph, what constant speed did she go for the remaining 4 hours to obtain the overall 65 mph average?

 
A)  65 mph

B)  60 mph

C)  57.5 mph

D)  59.5 mph

E)  62.5 mph

[yahya]

I think we should focus on the requirements of different departments.

[yahya]

B. (-3)^4 is +ve but -3^4 is -ve

[yahya]

modulus of x = y. Regardless of x, y is positive. But when x is -ve, y> x. therefore D

[yahya]

answer to the average score of 45 is 95.2

[yahya]

area of circle is 4.5 squared  times pi

[yahya]

constant speed = 57.5

[yahya]

how much wood could a woodchuck chuck if a woodchuck could chuck wood?

[sayma]

Good initiative indeed!

Sayma Suraiya
Sr. Lecturere

[tasnim_eco]

Can you please upload some questions with answer as a course pack. I think that will be more helpful

Amin Tasnim
Lecturer
BBA

[Reza S. H.]

well, during GMAT and GRE exams, we cannot use Calculator. and to get rid of this shortcoming, we must learn some shortcut techniques. from my point of view learning the multiple numbers from 1 to 30 has no alternative.

[sabrina]

I think Amin Tasnim is right.

[Reza S. H.]

okay... lemme start with Geometrical ones... do we remember the theorems that we were taught in our school years? let's get a brief...

1. Straight line indicates 180 degree. Any transversal intersecting creates two angles and summation of which equals 180 degree

can anyone tell the 2nd theorem?