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Re: What is the value of n in the equation - 25 + 19 + n = S ?
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08 Oct 2012, 02:55
1
SOLUTION
What is the value of n in the equation - 25 + 19 + n = s ?
(1) s = 2 --> - 25 + 19 + n = 2. We have a linear equation with one unknown, hence we can solve for it. Sufficient. (2) n/s = 4 --> s=n/4 --> - 25 + 19 + n = n/4. We have a linear equation with one unknown, hence we can solve for it. Sufficient.
WE 1: 7 Yrs in Automobile (Commercial Vehicle industry)
Re: What is the value of n in the equation - 25 + 19 + n = S ?
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08 Oct 2012, 03:09
St 1: Sufficient: Substitute S=2 in 25+19+n=2, Value of n can be found out from this linear equation. St 2: Sufficient: Substitute s=n/4 in 25+19+n=n/4, Value of n can be found out from this linear equation.
Hence Answer D
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Re: What is the value of n in the equation - 25 + 19 + n = S ?
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11 Oct 2012, 14:27
SOLUTION
What is the value of n in the equation - 25 + 19 + n = s ?
(1) s = 2 --> - 25 + 19 + n = 2. We have a linear equation with one unknown, hence we can solve for it. Sufficient. (2) n/s = 4 --> s=n/4 --> - 25 + 19 + n = n/4. We have a linear equation with one unknown, hence we can solve for it. Sufficient.
Answer: D.
Kudos points given to everyone with correct solution. Let me know if I missed someone.
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Re: What is the value of n in the equation - 25 + 19 + n = S ?
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15 Oct 2012, 14:36
Bunuel wrote:
SOLUTION
What is the value of n in the equation - 25 + 19 + n = s ?
(1) s = 2 --> - 25 + 19 + n = 2. We have a linear equation with one unknown, hence we can solve for it. Sufficient. (2) n/s = 4 --> s=n/4 --> - 25 + 19 + n = n/4. We have a linear equation with one unknown, hence we can solve for it. Sufficient.
Answer: D.
Kudos points given to everyone with correct solution. Let me know if I missed someone.
D straight Bunuel but could someone think about n/s=4 that n and s can be both positive or negative ?? 16/4 = 4 or -16/-4 = 4 so is not safely to cross multiply S ?? or this concern regards questions in which < or > are involved ??'
Re: What is the value of n in the equation - 25 + 19 + n = S ?
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15 Oct 2012, 15:28
carcass wrote:
Bunuel wrote:
SOLUTION
What is the value of n in the equation - 25 + 19 + n = s ?
(1) s = 2 --> - 25 + 19 + n = 2. We have a linear equation with one unknown, hence we can solve for it. Sufficient. (2) n/s = 4 --> s=n/4 --> - 25 + 19 + n = n/4. We have a linear equation with one unknown, hence we can solve for it. Sufficient.
Answer: D.
Kudos points given to everyone with correct solution. Let me know if I missed someone.
D straight Bunuel but could someone think about n/s=4 that n and s can be both positive or negative ?? 16/4 = 4 or -16/-4 = 4 so is not safely to cross multiply S ?? or this concern regards questions in which < or > are involved ??'
Thanks
You should be concerned about the signs only with inequalities. For equations you can safely cross-multiply.
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Re: What is the value of n in the equation - 25 + 19 + n = S ?
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31 Dec 2012, 23:47
hello, for statement (2), what if
n=4 and s=1
then -25 + 19 + 4 = -2 but s=1 NOT GOOD
also consider if n=8 and s=2
then -25 + 19 + 8 = 2 and s = 2 GOOD
since it is possible to pick different sets of numbers that yield conflicting answers, shouldn't this statement alone be insufficient? (refer to OG13 DS#41 for comparison)
Re: What is the value of n in the equation - 25 + 19 + n = S ?
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01 Jan 2013, 02:42
chekitsch wrote:
hello, for statement (2), what if
n=4 and s=1
then -25 + 19 + 4 = -2 but s=1 NOT GOOD
also consider if n=8 and s=2
then -25 + 19 + 8 = 2 and s = 2 GOOD
since it is possible to pick different sets of numbers that yield conflicting answers, shouldn't this statement alone be insufficient? (refer to OG13 DS#41 for comparison)
n=4 and s=1 do not satisfy - 25+19+n=s.
We have two equations: - 25+19+n=s and n/s=4. Solving gives n=8 and s=2.
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Re: What is the value of n in the equation - 25 + 19 + n = S ?
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28 Oct 2013, 21:13
fameatop wrote:
Reducing Stem we get n = s + 6 1) s=2--> n=8 ---> Sufficient 2) s=n/4 --->Sufficient
Answer D
For the second statement: I know I should stop after knowing that it's a linear-with one unknown, I'm rusty on my math, how does this become
I get this, N/S=4 S=4N (multiply each side) (lost in this step) I did the following N=S+6 N=4N+6 -3N=6 3 3 N=-2, (should be positive)
Not sure how I got a negative, I guessed correctly, the second time i worked the problem. I'm not sure how the MGMAT guide states that the number becomes S=1/4N, maybe so it's not negative, it's placed with a fraction? Can someone refresh me with that concept. thanks.
Re: What is the value of n in the equation - 25 + 19 + n = S ?
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29 Oct 2013, 02:22
selfishmofo wrote:
fameatop wrote:
Reducing Stem we get n = s + 6 1) s=2--> n=8 ---> Sufficient 2) s=n/4 --->Sufficient
Answer D
For the second statement: I know I should stop after knowing that it's a linear-with one unknown, I'm rusty on my math, how does this become
I get this, N/S=4 S=4N (multiply each side) (lost in this step) I did the following N=S+6 N=4N+6 -3N=6 3 3 N=-2, (should be positive)
Not sure how I got a negative, I guessed correctly, the second time i worked the problem. I'm not sure how the MGMAT guide states that the number becomes S=1/4N, maybe so it's not negative, it's placed with a fraction? Can someone refresh me with that concept. thanks.
Not sure I understand everything in your post but n/s = 4 means n = 4s (multiply both sides by s) not s = 4n.
Re: What is the value of n in the equation - 25 + 19 + n = S ?
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29 Oct 2013, 07:44
Bunuel wrote:
selfishmofo wrote:
fameatop wrote:
Reducing Stem we get n = s + 6 1) s=2--> n=8 ---> Sufficient 2) s=n/4 --->Sufficient
Answer D
For the second statement: I know I should stop after knowing that it's a linear-with one unknown, I'm rusty on my math, how does this become
I get this, N/S=4 S=4N (multiply each side) (lost in this step) I did the following N=S+6 N=4N+6 -3N=6 3 3 N=-2, (should be positive)
Not sure how I got a negative, I guessed correctly, the second time i worked the problem. I'm not sure how the MGMAT guide states that the number becomes S=1/4N, maybe so it's not negative, it's placed with a fraction? Can someone refresh me with that concept. thanks.
Not sure I understand everything in your post but n/s = 4 means n = 4s (multiply both sides by s) not s = 4n.
Hope it helps.
I'm not sure how the MGMAT guide states that the number becomes S=1/4N, maybe so it's not negative, it's placed with a fraction? Can someone refresh me with that concept. Thank you for the other concept, I missed that small detail in trying to explain the problem.
Re: What is the value of n in the equation - 25 + 19 + n = S ?
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29 Oct 2013, 07:47
selfishmofo wrote:
Bunuel wrote:
selfishmofo wrote:
For the second statement: I know I should stop after knowing that it's a linear-with one unknown, I'm rusty on my math, how does this become
I get this, N/S=4 S=4N (multiply each side) (lost in this step) I did the following N=S+6 N=4N+6 -3N=6 3 3 N=-2, (should be positive)
Not sure how I got a negative, I guessed correctly, the second time i worked the problem. I'm not sure how the MGMAT guide states that the number becomes S=1/4N, maybe so it's not negative, it's placed with a fraction? Can someone refresh me with that concept. thanks.
Not sure I understand everything in your post but n/s = 4 means n = 4s (multiply both sides by s) not s = 4n.
Hope it helps.
I'm not sure how the MGMAT guide states that the number becomes S=1/4N, maybe so it's not negative, it's placed with a fraction? Can someone refresh me with that concept. Thank you for the other concept, I missed that small detail in trying to explain the problem.
\(n = 4s\) --> \(s = \frac{n}{4}\) or \(\frac{1}{4}*n\) (it's not \(\frac{1}{4n}\)).
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Re: What is the value of n in the equation - 25 + 19 + n = S ?
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06 Jul 2019, 07:29
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Bunuel wrote:
What is the value of n in the equation: - 25 + 19 + n = s ?
(1) s = 2 (2) n/s = 4
Given: -25 + 19 + n = s Simplify: -6 + n = s Add 6 to both sides to get: n = s + 6
Target question:What is the value of n?
Statement 1: s = 2 We already know that n = s + 6 Replace s with 2 to get: n = 2 + 6 = 8 The answer to the target question is n = 8 Since we can answer the target question with certainty, statement 1 is SUFFICIENT
Statement 2: n/s = 4 Multiply both sides by s to get: n = 4s Divide both sides by 4 to get: n/4 = s
We already know that n = s + 6 Replace s with s with n/4 to get: n = n/4 + 6 Multiply both sides by 4 to get: 4n = n + 24 Subtract n from both sides to get: 3n = 24 Solve, n = 8 The answer to the target question is n = 8 Since we can answer the target question with certainty, statement 2 is SUFFICIENT
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82% (00:48) correct 
