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ps integer

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Joined: 30 May 2005
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13 Jun 2005, 15:51
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hello
how to approach this one thanks

13. How many integers n are there such that 1 < 5n + 5 < 25 ?
(A) Five
(B) Four
(C) Three
(D) Two
(E) One

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Intern
Joined: 19 Aug 2004
Posts: 47

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13 Jun 2005, 16:49
Set 5n + 5 = 25.

So, n = 4.

Check n = 0, 5n + 5 = 5.
n = 1, 5n + 5 = 10
n = 2, 5n + 5 = 15
n = 3, 5n + 5 = 20
n = 4, 5n + 5 = 25 REJECT this n.

So, I will go with B

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13 Jun 2005, 16:49
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