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If n is a positive integer, is n>3? 1) n^2>9 2) √n>1.5

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If n is a positive integer, is n>3? 1) n^2>9 2) √n>1.5  [#permalink]

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New post 27 Mar 2019, 02:31
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Question Stats:

50% (01:01) correct 50% (00:42) wrong based on 18 sessions

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If n is a positive integer, is \(n>3?\)
1) \(n^2>9\)
2) \(√n>1.5\)

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Re: If n is a positive integer, is n>3? 1) n^2>9 2) √n>1.5  [#permalink]

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New post 27 Mar 2019, 03:01
N is a positive integer, so n > 3 let's take 1st condition:

1) n^2 > 9, we obtain value of n, by sqaure root both side and it gives us condition n > 3

2) ✓n > 1.5, we try to find value of n, square both side and n>2.5 which do not gurantees n>3.

Correct answer is n>3 in 1st condition

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Re: If n is a positive integer, is n>3? 1) n^2>9 2) √n>1.5   [#permalink] 27 Mar 2019, 03:01
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If n is a positive integer, is n>3? 1) n^2>9 2) √n>1.5

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