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# If d is a positive integer, is d^(1/2) greater than 15?

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Senior DS Moderator
Joined: 27 Oct 2017
Posts: 1034
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Concentration: International Business, General Management
GPA: 3.64
WE: Business Development (Energy and Utilities)
If d is a positive integer, is d^(1/2) greater than 15?  [#permalink]

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Updated on: 01 Nov 2018, 21:29
00:00

Difficulty:

55% (hard)

Question Stats:

57% (01:39) correct 43% (01:57) wrong based on 28 sessions

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If d is a positive integer, is $$\sqrt{d}$$ greater than 15?

(1) d is divisible by 25.
(2) d is divisible by 40.

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Originally posted by gmatbusters on 01 Nov 2018, 08:45.
Last edited by Bunuel on 01 Nov 2018, 21:29, edited 1 time in total.
Renamed the topic and edited the question.
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Re: If d is a positive integer, is d^(1/2) greater than 15?  [#permalink]

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01 Nov 2018, 08:52
Question
Is D> 225?
St:1
d is divisible by 25.
When d=25 answer is no
When d=250 answer is yes
Not sufficient

St-2
d is divisible by 40.
When d=40 answer is no
When d=400 answer is yes
Not sufficient

Combine:
D is divisible by 25 and 40
LCM of 25 and 40 =200
When d=200 answer is no
When d=1000 answer is yes
Ans: E
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Re: If d is a positive integer, is d^(1/2) greater than 15? &nbs [#permalink] 01 Nov 2018, 08:52
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# If d is a positive integer, is d^(1/2) greater than 15?

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