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If the product of the integers w, x, y and z is 770, and if

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If the product of the integers w, x, y and z is 770, and if [#permalink]

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New post 10 Jul 2011, 04:52
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If the product of the integers w, x, y and z is 770, and if 1 < w < x < y < z, what is the value of w + z?

A. 10
B. 13
C. 16
D. 18
E. 21
[Reveal] Spoiler: OA

Last edited by Bunuel on 13 Jul 2013, 06:29, edited 1 time in total.
Renamed the topic, edited the question and added the OA.

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Re: 700 plus level question [#permalink]

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New post 10 Jul 2011, 05:11
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770 = 2 * 5 * 7 * 11

So w = 2, x = 5, y = 7, z = 11

w + z = 2 + 11 = 13

Answer - B
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Re: 700 plus level question [#permalink]

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New post 10 Jul 2011, 11:25
How can we be sure of these nos..It can be others also..How can one come with these nos

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Re: 700 plus level question [#permalink]

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New post 10 Jul 2011, 11:29
ruturaj wrote:
How can we be sure of these nos..It can be others also..How can one come with these nos


it can be any other number because these are prime factors of 770

770 = 77*10 = 7*11 * 2*5

hope this helps

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Re: 700 plus level question [#permalink]

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New post 05 Sep 2011, 12:57
Quote:
Product of w,x,y,z is 770.If w<x<y<z what is the value of w+z?
A. 10
B. 13
C. 16
D. 18
E. 21


prime factors of 770: 2, 5, 7, 11
Therefore:
w+z=2+11=13

Answer: B
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Re: If the product of the integers w, x, y and z is 770, and if [#permalink]

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New post 15 Oct 2017, 09:12
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Re: If the product of the integers w, x, y and z is 770, and if   [#permalink] 15 Oct 2017, 09:12
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