stne wrote:
Bunuel wrote:
The pattern of stones shown is contained completely around the circular bracelet so that the arc formed by joining the centers of any two adjacent stones is 45°. The number of stones on the bracelets is
(A) 5
(B) 6
(C) 8
(D) 10
(E) 12
Attachment:
2017-11-30_0949_002.png
Dear Moderator,
What Am I missing here, if each 45 degrees contains 2 stones , then when there are 8 - forty five degrees , shouldn't we do 8*2 = 16 stones .
Hope you can help, thank you.
Visualize here. When you take consecutive stone, suppose starting with 1 and 2 , the angle makes 45 degree. Now when you move further you will take 2 and 3 to make a 45 degree. So you see 2 is counted twice. In all each stone will be counted only once and not twice. Hence we will not multiply.
Hope that helps!!
If yes, Do not forget to give Kudos !!
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