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Math Expert V
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If p^(1/2) is a positive integer, what is the value of p?  [#permalink]

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Difficulty:   35% (medium)

Question Stats: 64% (01:04) correct 36% (01:02) wrong based on 56 sessions

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If $$\sqrt{p}$$ is a positive integer, what is the value of p?

(1) $$1 < \sqrt{p} < 7$$

(2) 11 < p < 27

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Re: If p^(1/2) is a positive integer, what is the value of p?  [#permalink]

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Bunuel wrote:
If $$\sqrt{p}$$ is a positive integer, what is the value of p?

(1) $$1 < \sqrt{p} < 7$$

(2) 11 < p < 27

Statement 1: $$1 < \sqrt{p} < 7$$ . only value is 4. no other number we have in this range for which we get an integer. Sufficient.

Statement 2: 11 < p < 27 . we have 25 , 16. we can get integer if we square them. NOT sufficient.

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Re: If p^(1/2) is a positive integer, what is the value of p?  [#permalink]

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1
P is a perfect square.
Statement 1: 1<p^1/2<7.
P can be 4,9,16,25,36. For which root[p] lies between 1 and 7. Insufficient.
Statement 2: p is between 11 and 27. P can be 16 or 25. Insufficient.

Both
P can be 16 or 25. Insufficient. Imo, option e.

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Re: If p^(1/2) is a positive integer, what is the value of p?  [#permalink]

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3
p is a perfect square. as given $$\sqrt{p}$$ is a positive integer
Statement 1: 1<$$\sqrt{p}$$<7.
By Squaring sides
p can be 4,9,16,25,36 and $$\sqrt{p}$$ will be 2,3,4,5,6. For which $$\sqrt{p}$$ lies between 1 and 7. Clearly Insufficient.

Statement 2: p is between 11 and 27. p can be 16 or 25. Clearly Insufficient.

Combining both statements p can be either 16 or 25 so again insufficient.

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If p^(1/2) is a positive integer, what is the value of p?  [#permalink]

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Bunuel wrote:
If $$\sqrt{p}$$ is a positive integer, what is the value of p?

(1) $$1 < \sqrt{p} < 7$$

(2) 11 < p < 27

$$\sqrt{p}$$ is a positive integer when "p" is a perfect square.

Question : What is p?

Statement 1 : 1 < $$\sqrt{p}$$ < 7

Squaring this we get ,

$$1^2 < p < 7^2$$

1 < p < 49

Valid values of p = 4, 9, 16, 25, 36 ----- NOT SUFFICIENT

Statement 2 : 11 < p < 27

Valid values of p = 16, 25 ----- NOT SUFFICIENT

From 1 and 2 we get,

p = 16 and 25

NOT SUFFICIENT.

(E)

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Originally posted by AkshdeepS on 05 Apr 2019, 01:50.
Last edited by AkshdeepS on 05 Apr 2019, 03:47, edited 2 times in total.
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Re: If p^(1/2) is a positive integer, what is the value of p?  [#permalink]

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Bunuel wrote:
If $$\sqrt{p}$$ is a positive integer, what is the value of p?

(1) $$1 < \sqrt{p} < 7$$

(2) 11 < p < 27

#1
$$1 < \sqrt{p} < 7$$
1<p<49
p can have many values
#2
11<p<27
p can have many values
from1 & 2
nothing in common
IMO E Re: If p^(1/2) is a positive integer, what is the value of p?   [#permalink] 05 Apr 2019, 03:41
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# If p^(1/2) is a positive integer, what is the value of p?  