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Expert replies
by rahul.s » Tue Feb 23, 2010 1:06 am
If 338c = r^2 , and c is the smallest positive integer such that r is an integer, then r must be:

(A) 2
(B) 13
(C) 26
(D) 52
(E) 104

OA: [spoiler]C: 26[/spoiler]
Source: Knewton
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Source: — Problem Solving |

by ajith » Tue Feb 23, 2010 1:09 am
rahul.s wrote:If 338c = r^2 , and c is the smallest positive integer such that r is an integer, then r must be:

(A) 2
(B) 13
(C) 26
(D) 52
(E) 104

OA: [spoiler]C: 26[/spoiler]
Source: Knewton
In this question answer is B because 338 = 13*13*2
to make it a square we need to multiply by 2

Now, if the question were 338c = r^3 etc etc .. Please see this link

https://www.beatthegmat.com/338c-r-3-t51270.html
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by rahul.s » Tue Feb 23, 2010 2:57 am
sorry for double posting. i used the search option but couldn't find this problem.
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