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

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

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New post 16 Dec 2017, 01:27
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A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

61% (00:52) correct 39% (00:23) wrong based on 41 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
2017-12-15_1300_003.png [ 10.42 KiB | Viewed 669 times ]

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Re: In pentagon ABCDE above, how many diagonals with positive slopes can  [#permalink]

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New post 16 Dec 2017, 08:11
1
It can be easily noticed by drawing that only 2 diagonals are with positive slopes.

Please see the sketch attached.

Bunuel wrote:
Image
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
WhatsApp Image 2017-12-16 at 20.36.39.jpeg [ 92.41 KiB | Viewed 474 times ]


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Re: In pentagon ABCDE above, how many diagonals with positive slopes can  [#permalink]

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New post 16 Dec 2017, 08:28
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.

Please see the sketch attached.

Bunuel wrote:
Image
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

_________________

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All you need for Quant, GMAT PS Question Directory,GMAT DS Question Directory
Error log/Key Concepts
Combination Concept: Division into groups
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In pentagon ABCDE above, how many diagonals with positive slopes can  [#permalink]

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New post 16 Dec 2017, 11:41
1
Bunuel wrote:
Image
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

(C) is the answer.
In pentagon ABCDE above, how many diagonals with positive slopes can &nbs [#permalink] 16 Dec 2017, 11:41
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