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# In pentagon ABCDE above, how many diagonals with positive slopes can

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Math Expert
Joined: 02 Sep 2009
Posts: 53020
In pentagon ABCDE above, how many diagonals with positive slopes can  [#permalink]

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16 Dec 2017, 00:27
00:00

Difficulty:

25% (medium)

Question Stats:

70% (01:00) correct 30% (00:41) wrong based on 42 sessions

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In pentagon ABCDE above, how many diagonals with positive slopes can be drawn?

(A) None
(B) One
(C) Two
(D) Three
(E) Four

Attachment:

2017-12-15_1300_003.png [ 10.42 KiB | Viewed 807 times ]

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Senior DS Moderator
Joined: 27 Oct 2017
Posts: 1207
Location: India
GPA: 3.64
WE: Business Development (Energy and Utilities)
Re: In pentagon ABCDE above, how many diagonals with positive slopes can  [#permalink]

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16 Dec 2017, 07:11
1
It can be easily noticed by drawing that only 2 diagonals are with positive slopes.

Bunuel wrote:

In pentagon ABCDE above, how many diagonals with positive slopes can be drawn?

(A) None
(B) One
(C) Two
(D) Three
(E) Four

Attachment:
The attachment 2017-12-15_1300_003.png is no longer available

Attachments

WhatsApp Image 2017-12-16 at 20.36.39.jpeg [ 92.41 KiB | Viewed 596 times ]

_________________
Senior DS Moderator
Joined: 27 Oct 2017
Posts: 1207
Location: India
GPA: 3.64
WE: Business Development (Energy and Utilities)
Re: In pentagon ABCDE above, how many diagonals with positive slopes can  [#permalink]

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16 Dec 2017, 07:28
Please note that it is not necessary to find the total no. of diagonals. But I have calculated the number of diagonals because, it does help in ensuring that no diagonal is left unchecked unintentionally.

gmatbusters wrote:
It can be easily noticed by drawing that only 2 diagonals are with positive slopes.

Bunuel wrote:

In pentagon ABCDE above, how many diagonals with positive slopes can be drawn?

(A) None
(B) One
(C) Two
(D) Three
(E) Four

Attachment:
2017-12-15_1300_003.png

_________________
Manager
Joined: 24 Nov 2016
Posts: 151
In pentagon ABCDE above, how many diagonals with positive slopes can  [#permalink]

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16 Dec 2017, 10:41
1
Bunuel wrote:

In pentagon ABCDE above, how many diagonals with positive slopes can be drawn?

(A) None
(B) One
(C) Two
(D) Three
(E) Four

Attachment:
2017-12-15_1300_003.png

Positive slopes must run upwards going right.

1# A to C
2# A to D

In pentagon ABCDE above, how many diagonals with positive slopes can   [#permalink] 16 Dec 2017, 10:41
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