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jeffn
D
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I think it will be D, what do you guys think
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Problem Solving Butler: August 2026
August 6PS 1PS 2

___________________________
PS 1

In the sequence \(S_1, S_2, S_3 . . . S_n\) ,

\(S_m\) = \(S_{m-1}\) + \(S_{m-2}\) for all m > 2.

If \(S_1\) = 0 and \(S_{n-1}\)= \(8S_2\), how many terms does the sequence have?

A) 8
B) 9
C) 10
D) 11
E) 12

___________________________
PS 2

What is the probability that a person born between the years 1990 and 2010, inclusive, was born in a leap year?

A) 1/21
B) 1/7
C) 1/5
D) 5/21
E) 1/4
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Critical Reasoning Butler: August 2026
August 6CR 1CR 2

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CR 1

­Between 2000 and 2010, the number of bass in the Mississippi River and its tributaries experienced a catastrophic decline. There is little evidence that pollution or disease was the cause, so it is likely that there was an increase in the number of bass killed by other means. Typically, recreational fishermen in the region prefer to pursue several varieties of river trout, but a state law passed in 2001 banned the catching of trout in the area. Thus, it is likely that recreational fishing was the immediate cause of the decline of the bass population.

Which of the following, if true, most strengthens the argument?

A. The number of Over crayfish, one of the primary sources of nutrition for bass, has quadrupled since the bass population collapsed.

B. Bass prey upon trout and compete for many of the same food sources.

C. The most significant concentrations of remaining bass are in areas of the river where fishing is prohibited.

D. Recreational fishing is less popular now than it was in 2000.

E. Recreational fishing has caused a decline in the populations of several species of fish in other habitats.
________________________
CR 2

­Company spokesperson: The plan to include fewer varieties of meat in Brand X dog food is doomed to failure. It will certainly cause fewer consumers to buy Brand X dog food.

Sales analyst: Actually, marketing studies show that there is no correlation between the number of varieties of meat in a dog food and sales of that dog food.

Which of the following is the most serious criticism of the sales analyst's argument?

(A) The sales analyst does not refer to any specific statistics.

(B) The sales analyst does not specifically refer to Brand X dog food.

(C) The sales analyst's argument is based on outmoded ideas of causality.

(D) The sales analyst refers to how many varieties of meat are in a dog food rather than to the decrease in the number of varieties of meat in the dog food.

(E) The sales analyst presents her evidence in a manner designed to disprove any relationship between ingredients and dog food sales.
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Data Sufficiency Butler: August 2026
August 6DS 1DS 2

______________________
DS 1

­If each month, Gandalf spends $1400 of his earnings on food, how much does he save every month?

(1) Gandalf spends 1/4th of his earnings on rent, 1/2 of his earnings he saves and the remaining amount he spends on food.
(2) He spends 1/4th of his earnings on food.
______________________
DS 2

At SoHo Corp, what is the ratio of managers to non-managers?

(1) If there were 3 more managers and the number of salespeople remained the same, then the ratio of managers to non-managers would double.
(2) There are 4 times as many non-managers as managers at SoHo Corp.
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Need Advice: 2 Months of Self-Study – Progress, but Stuck on Hard Questions (Target 705+)

Hi everyone,

I’ve been self-studying for the GMAT for the past two months, and I’ve made noticeable progress, but I’ve also identified some recurring issues that I’m not sure how to fix. I’d really appreciate advice from anyone who has been through a similar stage for Quant

I can solve most easy and a good number of medium GMAT Club questions comfortably, usually within 2 minute.
My biggest issue is with hard questions. I often struggle to identify the right approach. However, when I read the solution afterward, I usually understand the logic immediately and think, "That makes sense."
It feels like I have the concepts, but I don’t yet have the pattern recognition needed to quickly identify the best approach on my own.

### Verbal

I can solve most easy and many medium questions correctly.
Hard questions are still a challenge. My main problems are:

I can’t pre-think the answer choices quickly enough.
I spend too much time understanding the author’s intent, the logic between sentences, and the overall argument.
Because of this, I often exceed the ideal 2–3 minutes per question.

### Data Insights (DI)

My biggest issue is speed. I take too long to analyze tables, graphs, and multiple data sources before I can even start solving the question.
I feel that my data interpretation process isn’t efficient enough.

### My Questions

1. Is this a normal stage after about two months of preparation?
2. How do I improve my ability to recognize the correct approach for difficult Quant questions without looking at the solution?
3. How can I improve my reading speed, pre-thinking, and comprehension for difficult Verbal questions?
4. What is the best way to become faster at analyzing data in DI?
5. At this stage, should I continue solving more practice questions, or should I spend more time reviewing and analyzing my mistakes?

For context, I’m aiming for a 705+ GMAT Focus score. Any advice, study strategies, or resources that helped you get past this stage would be greatly appreciated.

Thank you!

And also i am any using gmat ninja free video and gmat club for prep till now
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*jeffn sends image:*
B.
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Hi I am planning on giving the GMAT in October and have already given 3 mocks (1 GMAT official + 2 free) wherein I got a 575-570 across the board. I want to target atleast a 695 or above in my official attempt - should I go for a crash course/coaching for this or continue to use gmatclub questions for prep and then maybe just get a few mocks to practice things out
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Problem Solving Butler: August 2026
August 7PS 1PS 2

_____________________________
PS 1

\(P = \frac{x^2−1}{x^2+1 }\)

If x is replaced with \(\frac{-1}{x}\) in the expression P, the expression Q is obtained. Which of the following is the correct relationship between P and Q?

A) \(PQ=1\)

B) \(P+Q=0\)

C) \(\frac{P}{Q } = 1\)

D) \(\frac{P}{Q^2} = -1\)

E) \(\frac{P}{Q^2} = 1\)


_____________________________
PS 2

List A: 7, a, b, c

List B: 2, 3, 6, a, b, c

If the average (arithmetic mean) of the 4 numbers in list A is 10, what is the average of the 6 numbers in list B?

A. 22
B. 11
C. 22/3
D. 11/3
E. 11/6
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Critical Reasoning Butler: August 2026
August 7CR 1CR 2

_____________________
CR 1

A number of college students were recruited by the psychology department to participate in a paid, unspecified experiment, which turned out to be a menial, monotonous counting exercise. Unbeknownst to the students, half of the participants were paid a meager rate for their participation, while half received a generous rate. After the counting exercise was complete, each student was asked questions on his or her perception of the counting exercise. Surprisingly, the participants who had been paid less reported higher levels of enjoyment in completing the exercise than the higher-paid participants did.

Which of the following hypotheses, if true, best accounts for the findings of the experiment?

A. In both groups, the portion of the brain activated by counting was disrupted by the exercise and distorted perceptions of financial quantities.

B. Those who counted faster in the experiment experienced more satisfaction than those who counted more slowly.

C. The participants who were paid less had more motivation, conscious or unconscious, to justify their participation in the menial exercise.

D. The energy expenditure of counting in the human mind was associated with the cognitive load of worrying about a quantity of money.

E. Counting is most capably performed by accountants, whose level of satisfaction is highest while they are at work.
_____________________
CR 2

­Wappo, a company that manufactures turbine blades for hydroelectric dams, has designed a new model of blade with a superior hydrodynamic form that will save energy and hence cost in implementation. Wappo is willing to sell these blades to a particular hydroelectric dam at no initial cost. The only payment will be the difference between, first, a percentage of the dam's improved profits, as measured by the percentage improvement of the hydroelectric dam efficiency times the value of energy sold by the plant over an 18-month period, and, second, the additional cost of installation and maintenance of the new turbines. On installation, the dam will make an estimated payment, which will be adjusted after eighteen months to equal the proper amount.

Which of the following, if it occurred, would constitute a disadvantage for Wappo of the plan described above?

A. Another manufacturer's introduction to the market of a similarly efficient turbine blade

B. The dam's need for a large number of turbine blades

C. Energy efficiency of the dam's current turbines somewhat below the industry average

D. Levels of demand for hydroelectric power that were stagnant but above predicted levels

E. Uncharacteristic weather conditions decreasing the amount of energy that can be harvested through hydroelectric means at the dam's location
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Data Sufficiency Butler: August 2026
August 7DS 1DS 2

____________________
DS 1

­Justin took a test of French at school and scored 72 marks out of 100. If there were 20 students who appeared for the test, within how many standard deviations from the mean did Justin’s score lie?

(1) Darren and Matthew scored 70 and 75 respectively and their scores were within one standard deviation from the mean.

(2) The mean score of 20 students was 65 and Andrew who scored 59 was within one standard deviation of the mean.

____________________
DS 2

­What is Ben’s age?

(1) Two years less than twice Ben’s age is equal to twice of Erin’s age 3 years ago.
(2) Twice of Erin’s age is 4 more than twice of Ben’s age.
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