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If k is a positive integer, what is the value of k? (1) k^2 <10 (2) k

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Bunuel
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If k is a positive integer, what is the value of k? (1) k^2 <10 (2) k [#permalink] New post   13 Apr 2018, 02:07
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If k is a positive integer, what is the value of k?

(1) k^2 <10
(2) k^5 > 30
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E
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NiharikaR
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Re: If k is a positive integer, what is the value of k? (1) k^2 <10 (2) k [#permalink] New post   13 Apr 2018, 03:08
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IMO C

St1 k=1,3
insufficient
St2 k=2,3......
insufficient

combining k=3
sufficient
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KS15
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Re: If k is a positive integer, what is the value of k? (1) k^2 <10 (2) k [#permalink] New post   13 Apr 2018, 03:12
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NiharikaR wrote:
IMO C

St1 k=1,3
insufficient
St2 k=2,3......
insufficient

combining k=3
sufficient


k can be either 2 or 3. So Answer is E.
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pedromota
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Re: If k is a positive integer, what is the value of k? (1) k^2 <10 (2) k [#permalink] New post   26 Apr 2018, 15:45
NiharikaR wrote:
IMO C

St1 k=1,3
insufficient
St2 k=2,3......
insufficient

combining k=3
sufficient


Would be:
(1)
K={1,2,3}
K^2={1,4,9}<10

(2)
K={2,3}

So even if you use both of them you can't conclude the value of K, could be either 2 or 3.
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Re: If k is a positive integer, what is the value of k? (1) k^2 <10 (2) k [#permalink] New post   28 Apr 2018, 06:23
I) gives value of K as 1,2 and 3
Insufficient

II)gives value as 2,3

Combining give values as 2 and 3
Multiple values so no definite answer so E is aNswer

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Re: If k is a positive integer, what is the value of k? (1) k^2 <10 (2) k [#permalink]
28 Apr 2018, 06:23
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Bunuel
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