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# number property

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Manager
Joined: 04 Sep 2006
Posts: 113

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24 May 2009, 08:04
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When which of digits in 452*36*17 increase 1, the product will increase less than 1,000?-
A. 1
B. 2
C. 5
D. 7
E. 4
Manager
Joined: 24 May 2007
Posts: 94
Location: Phoenix, AZ
Schools: Stanford R1(W/o Int), HBS R1(W/o Int), Kellogg R1(Ding), Haas R2(W/o Int), Wharton R2(W/o Int), Darden(W/o Int)

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24 May 2009, 23:21
vcbabu wrote:
When which of digits in 452*36*17 increase 1, the product will increase less than 1,000?-
A. 1
B. 2
C. 5
D. 7
E. 4

It would be B.
When you increase the 1, the number is 452*36*27 and increases by 452*36*10 and is greater than 1000.
When you increase the 2, the number is 453*36*27 and increases by 36*27 which is 972 and is less than 1000
When you increase the 5, the number is 462*36*17 and increases by 10*36*17 and is greater than 1000.
when you increase the 7, the number is 462*36*18 and increases by 462*36 and is greater than 1000.
When you increase the 4, the number is 552*36*17 and increases by 100*36*17 and is greater than 1000.

Shiva
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Re: number property   [#permalink] 24 May 2009, 23:21
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