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If one of the followings is the product of the two 3-digit

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Joined: 24 Feb 2013
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Location: Argentina
WE: Project Management (Energy and Utilities)
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If one of the followings is the product of the two 3-digit [#permalink] New post 01 May 2013, 06:03
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Difficulty:

  15% (low)

Question Stats:

81% (01:48) correct 19% (01:22) wrong based on 77 sessions
If one of the followings is the product of the two 3-digit integers 8K7 and 6L9 (K and L denote the tens digit of the respective integers), then that product must be

(A) 478,823
(B) 511,913
(C) 531,875
(D) 538,424
(E) 569,114
[Reveal] Spoiler: OA
4 KUDOS received
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Joined: 24 Feb 2013
Posts: 16
Location: Argentina
WE: Project Management (Energy and Utilities)
Followers: 2

Kudos [?]: 10 [4] , given: 2

Re: Number Properties - Product [#permalink] New post 01 May 2013, 06:03
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To know the unit digit you can multiply both digit number: 7 x 9 = 63
This eliminates C, D, and E, because the number must end with a 3

To know the answer you can multiply both the thousand digit giving 8 x 6 = 48 so the number must be bigger than 480.000.
So the answer is B
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Re: If one of the followings is the product of the two 3-digit [#permalink] New post 13 Aug 2014, 15:40
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Re: If one of the followings is the product of the two 3-digit   [#permalink] 13 Aug 2014, 15:40
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