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  For any integers x and y, min(x, y) and Max(x, y) denote [#permalink]
New postPosted: Sat May 29, 2010 1:23 pm 
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Hey Guys, I was wondering if you could help me solve this problem:

For any integers x and y, min(x, y) and Max(x, y) denote the minimum and the maximum of x and y, respectively. For example, min (5, 2) = 2 and max (5, 2) = 5. For the integer w, what is the value of min(10, w)?

(1) w = max(20, z) for some integer z
(2) w = max(10, w)

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  Re: OG-12 DS #115 [#permalink]
New postPosted: Sat May 29, 2010 1:52 pm 
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snkrhed wrote:
Hey Guys, I was wondering if you could help me solve this problem:

For any integers x and y, min(x, y) and Max(x, y) denote the minimum and the maximum of x and y, respectively. For example, min (5, 2) = 2 and max (5, 2) = 5. For the integer w, what is the value of min(10, w)?

(1) w = max(20, z) for some integer z
(2) w = max(10, w)


If w\geq{10}, then min(10,w)=10.
If w<10, then min(10,w)=w and for statement(s) to be sufficient we should be able to get single value of w.

(1) w = max(20, z) --> w\geq{20}, hence w\geq{10}, so min(10,w)=10. Sufficient.

(2) w = max(10, w) --> w\geq{10}, hence min(10,w)=10. Sufficient.

Answer: D.

Hope it's clear.

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  Re: OG-12 DS #115 [#permalink]
New postPosted: Sat May 29, 2010 2:43 pm 
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snkrhed wrote:
If w\geq{10}, then min(10,w)=10.
If w<10, then min(10,w)=w and for statement(s) to be sufficient we should be able to get single value of w.

Can you explain how you deduced this part?


The question is min(10,w)=? Basically the question is: what is the value of least number between 10 and w?

Now if w\geq{10}, for instance if w=11, then min(10,11)=10. But if w<10, for instance w=9, then min(10,9)=9=w.

(1) w = max(20, z) --> max(20, z)=20=w. when z\leq{20}, so w=20>10 and min(10,w)=10 or max(20, z)=z=w. when z>{20}, so w=z>10 and again min(10,w)=10. Sufficient.

(2) w = max(10, w) --> directly tells us that w\geq{10}, hence min(10,w)=10. Sufficient.

Answer: D.

Hope it's clear.

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  Re: OG-12 DS #115 [#permalink]
New postPosted: Sat May 29, 2010 2:24 pm 
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If w\geq{10}, then min(10,w)=10.
If w<10, then min(10,w)=w and for statement(s) to be sufficient we should be able to get single value of w.

Can you explain how you deduced this part?

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  something wrong here? [#permalink]
New postPosted: Tue Jul 20, 2010 8:22 pm 
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hello all,
this is the question..
for any integers x and y. min(x, y) and max (x, y) denote the minimum and maximum of x and y, respectively. for example, min (5, 2) = 2 and max (5, 2) = 5. for the integer w, what is the value of min (10, w)?
1) w = max ( 20, z) and some integer z.
2) w = max (10, w)
explanation:
of w is greater than or equals to 10, then min ( 10, w) = 10, and if w is less than 10, then min (10, w) = w. therefore, the value of min (10, w) can be determined if the value of w can be determined.
1) given that w = max (20, z), then w is greater than or equals to 20. hence, w is greater than or equals to 10, and so min ( 10, w) =10, sufficient.
2) given that w = max ( 10, w ), then w is greater than or equals to 10, and so min ( 10, w) = 10, sufficient

i wonder if the z on the first statement is a typo because there are 2 unknown variables in the 1st statement, and how does it get w is greater than or equals to 20 since z is unknown? is it possible that the Z in the statement is a typo and should be W? please comment! thanks!


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  Re: For any integers x and y, min(x, y) and Max(x, y) denote [#permalink]
New postPosted: Wed Nov 30, 2011 1:42 pm 
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Statement 1 has nice trap built in to catch us under time pressure.

rephrased question is Is w\geq10?
(1) Gives w\geq20 Sufficient.
(2) Gives w\geq 10 Sufficient


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  Re: For any integers x and y, min(x, y) and Max(x, y) denote [#permalink]
New postPosted: Sat Jan 14, 2012 4:11 am 
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For the integer w, what is the value of min (10, w)?

1) w = max (20, z) for some integer z

2) w = max (10, w)

Min (x,y) or max (x, y) is a selection from x and y.  

When x = y, min (x,y) and max (x,y) are the same. Therefore, min (10, w) = 10, if w = 10.

We can also deduce that min (10, w) = 10, if w > 10.

(1) w = max (20, z). 

Consider RHS. Variable z, Max can be (a) 20, (b) z (if z > 20) or (c) both.

(a): z < 20. Max(20,z) = 20. w = 20.
(b): z > 20. Max(20,z) = z.   w > 20.
(c): z = 20. Max(20,z) = 20. w = 20.

All values for w are greater than 10.  Min (10, w) is 10.

2) w = max (10, w).

w is the maximum value of a set that includes 10.  Therefore, all values for w are at least 10 and min (10,w) cannot be below 10.

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  Re: For any integers x and y, min(x, y) and Max(x, y) denote [#permalink]
New postPosted: Tue Jan 17, 2012 8:19 pm 
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For any integers x and y, min(x, y) and Max(x, y) denote the minimum and the maximum of x and y, respectively. For example, min (5, 2) = 2 and max (5, 2) = 5. For the integer w, what is the value of min(10, w)?

(1) w = max(20, z) for some integer z

Min value of w will be 20.

min(10, w) will be 10

Sufficient

(2) w = max(10, w)

Min value of w will be 10.

min(10, w) will be 10

Sufficient


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  Re: For any integers x and y, min(x, y) and Max(x, y) denote [#permalink]
New postPosted: Fri Feb 03, 2012 5:28 am 
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icaniwill wrote:
Statement 1 has nice trap built in to catch us under time pressure.

rephrased question is Is w\geq10?
(1) Gives w\geq20 Sufficient.
(2) Gives w\geq 10 Sufficient


Merging similar topics. Please ask if anything remains unclear.

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DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS - Latest set of tough DS questions; 9 Devil's Dozen!!! (13 questions) - THIS WEEK'S ADDITION!!!


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