GMAT Data Sufficiency Discussions

cant get this in a simple way..any one has a simple way?


During a 7-year period the profits of Midas, Inc. changed by what percent from the sixth year to the seventh year?
(1) The profits of Midas, Inc. during the seventh year were 50 percent greater than the profits during the third year.
(2) The increase in the profits of Midas, Inc. was the same for each year during the 7-year period.
A) Statement (1) BY ITSELF is sufficient to answer the question, but statement (2) by itself is not.
B) Statement (2) BY ITSELF is sufficient to answer the question, but statement (1) by itself is not.
C) Statements (1) and (2) TAKEN TOGETHER are sufficient to answer the question, even though NEITHER statement BY ITSELF is sufficient.
D) Either statement BY ITSELF is sufficient to answer the question.
E) Statements (1) and (2) TAKEN TOGETHER are NOT sufficient to answer the question,

cant get this in a simple way..any one has a simple way?


During a 7-year period the profits of Midas, Inc. changed by what percent from the sixth year to the seventh year?
(1) The profits of Midas, Inc. during the seventh year were 50 percent greater than the profits during the third year.
(2) The increase in the profits of Midas, Inc. was the same for each year during the 7-year period.
A) Statement (1) BY ITSELF is sufficient to answer the question, but statement (2) by itself is not.
B) Statement (2) BY ITSELF is sufficient to answer the question, but statement (1) by itself is not.
C) Statements (1) and (2) TAKEN TOGETHER are sufficient to answer the question, even though NEITHER statement BY ITSELF is sufficient.
D) Either statement BY ITSELF is sufficient to answer the question.
E) Statements (1) and (2) TAKEN TOGETHER are NOT sufficient to answer the question,


Isnt the answer C ?

I got only one way. I think its the simplest way.

None of the statements together is sufficient.

Assume that the profit in the third year was Rs. 100 and in the 7th year is Rs. 150. Stat 2 says that profits was the same each year.
This translates into 12.5 each yr viz

100, 112.5, 125, 137.5, 150

And hence we can get the answer as 9.09%.
Hey amit,
I've been searching for OG to facts-inference-judgment,
If you have the soft copy of the same, I would be thankful to you if you could mail it to me.


Prashant I did not get what you mean by "OG to facts-inference-judgment". Unlike CAT , GMAT does not have F-I-J questions.

Is x/3 + 3/x > 2?
1. x2. x>1

I think the Answer is (A) - Statement 1 alone is sufficient.

What is the OA?

Is x/3 + 3/x > 2?
1. x2. x>1
I think the Answer is (A) - Statement 1 alone is sufficient.

What is the OA?



I suppose the 2 alone is sufficient as any number greater than 1 will always satsify this sol..
but if number is
wat sthe OA
Is x/3 + 3/x > 2?
1. x2. x>1


i guess answer should be B
Is x/3 + 3/x > 2?
1. x2. x>1


The inequality x/3 + 3/x > 2?, simplifies to is (x-3)^2 > 0... and clearly it would be true for all values of 'x', except when x=3.

1. x2. x>1, x cannot be '0' -- so sufficient.

So, my take 'B'.
The inequality x/3 + 3/x > 2?, simplifies to is (x-3)^2 > 0... and clearly it would be true for all values of 'x', except when x=3.

1. x2. x>1, x cannot be '0' -- so sufficient.

So, my take 'B'.


OA given is C !
Is x/3 + 3/x > 2?
1. x2. x>1


AM >= GM for positve integers
so expression >=2 for positive integers
but for x =3 its becomes equal so
i need x1 for it to be true.
so C
AM >= GM for positve integers
so expression >=2 for positive integers
but for x =3 its becomes equal so
i need x1 for it to be true.
so C


Hi,

Didn't quite get your explanations. Can you pls explain in detail...

Thanks.
Hi,

Didn't quite get your explanations. Can you pls explain in detail...

Thanks.



X>1 cannot satisy,because when x=3 , the result would be 2 and 2 cannot be greater than 2.]

So B is clearly insufficient

OA should be C
X>1 cannot satisy,because when x=3 , the result would be 2 and 2 cannot be greater than 2.]

So B is clearly insufficient

OA should be C

x/3+3/x>2
Put x/3 = t
given t+1/t>2 => t^2-2t+1>0 => (t-1)^2>0
t is always positive irrespective of its value
but t = x/3
Stem 1: x
x>1, for x=3, the expression becomes 0 and the inequality invalid

Combining both, 1hence C

PS: its so easy to solve problems if one knows the answer....

What if these were the first 5 questions on ur G Day ?!

1.The sum of the first N-1 terms of an Arithmetic Progression is zero
or positve and sum of the first N terms is negative. What is the
value of N?

1. The common difference is -4 and the 7th term is the last positive term.
2. The first term is 25 and there are 7 positive terms and all are integers.

2. Is the five digited number ABCDE divisible by 13?

1. The number CD is divisible by 13.
2. 10A+B+4C+3D-E is divisible by 13.

3. The roots of a quadratic equatin ax^2+bx+c=0 are integers and
a+b+c>0 and a>0. Are both the roots of the equation positive?

(1) Sum of the roots is positive.
(2) Product of the roots is positive.

4. In triangle ABC angle A is the greatest angle. D is the foot of the
perpendicular dropped on to BC from A. Is triangle ABC
right-angled?

1. AD^2= BD x DC.
2. AD/DC
5. What is the reminder when X^4 + Y^4 is divided by 5

1. When X-Y is divided by 5 reminder is 1
2. When X+Y is divided by 5 reminder is 2

What if these were the first 5 questions on ur G Day ?!

1.The sum of the first N-1 terms of an Arithmetic Progression is zero
or positve and sum of the first N terms is negative. What is the
value of N?

1. The common difference is -4 and the 7th term is the last positive term.
2. The first term is 25 and there are 7 positive terms and all are integers.

2. Is the five digited number ABCDE divisible by 13?

1. The number CD is divisible by 13.
2. 10A+B+4C+3D-E is divisible by 13.

3. The roots of a quadratic equatin ax^2+bx+c=0 are integers and
a+b+c>0 and a>0. Are both the roots of the equation positive?

(1) Sum of the roots is positive.
(2) Product of the roots is positive.

4. In triangle ABC angle A is the greatest angle. D is the foot of the
perpendicular dropped on to BC from A. Is triangle ABC
right-angled?

1. AD^2= BD x DC.
2. AD/DC
5. What is the reminder when X^4 + Y^4 is divided by 5

1. When X-Y is divided by 5 reminder is 1
2. When X+Y is divided by 5 reminder is 2


you need a lot of luck and your chance of a QA 52 are bleak
though all of them doable..
1) If 500 is a multiple of 100 that is closest to x and 400 is a multiple of 100 that is closest to y,which multiple of 100 is closest to x+y?
a) xb) y
2) If x and y are positive integers such that x= 8y +12 ,what is the GCD of x and y?
a) x=12u , where u is an integer
b) y=12z , where z is an integer

What if these were the first 5 questions on ur G Day ?!

1.The sum of the first N-1 terms of an Arithmetic Progression is zero
or positve and sum of the first N terms is negative. What is the
value of N?

1. The common difference is -4 and the 7th term is the last positive term.
2. The first term is 25 and there are 7 positive terms and all are integers.

2. Is the five digited number ABCDE divisible by 13?

1. The number CD is divisible by 13.
2. 10A+B+4C+3D-E is divisible by 13.

3. The roots of a quadratic equatin ax^2+bx+c=0 are integers and
a+b+c>0 and a>0. Are both the roots of the equation positive?

(1) Sum of the roots is positive.
(2) Product of the roots is positive.

4. In triangle ABC angle A is the greatest angle. D is the foot of the
perpendicular dropped on to BC from A. Is triangle ABC
right-angled?

1. AD^2= BD x DC.
2. AD/DC
5. What is the reminder when X^4 + Y^4 is divided by 5

1. When X-Y is divided by 5 reminder is 1
2. When X+Y is divided by 5 reminder is 2


God forbid if such questions appear on G-day..

My Picks are
1)E
2)B
3)C
4)D
5)A

What r the OAs??
1) If 500 is a multiple of 100 that is closest to x and 400 is a multiple of 100 that is closest to y,which multiple of 100 is closest to x+y?
a) x
b) y
2) If x and y are positive integers such that x= 8y +12 ,what is the GCD of x and y?
a) x=12u , where u is an integer
b) y=12z , where z is an integer


For 1st it will be C both is required ,, as 451
and 351


For the second one B i suppose is sufficent .. as the one GCD will be 12....
what say PUYS
The inequality x/3 + 3/x > 2?, simplifies to is (x-3)^2 > 0... and clearly it would be true for all values of 'x', except when x=3.

1. x2. x>1, x cannot be '0' -- so sufficient.

So, my take 'B'.



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Another question what the range of
X>X+1

A set of mixing bowls consists of 6 bowls of varying diameters. Will the 4 bowls with the smallest diameters fit side by side on a kitchen shelf x centimeters in length?

(1) The average (arithmetic mean) diameter of all 6
bowls is 15 centimeters.
(2) The length of the shelf is 50 centimeters.