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เครื่องมือของหัวข้อ | ค้นหาในหัวข้อนี้ |
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#47
21 ตุลาคม 2010, 15:41
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ได้แล้วครับ โหววว รอบกลีบกุหลาาบ
__________________
Analysis  Topology  Algebra  Number thoery 
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#49
23 มีนาคม 2016, 09:09
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เข้ามาดูกระทู้นี้แล้วคิดถึงตอนตัวเองอยู่ ม ต้น มากๆครับ
ใช้เวลาหลายสัปดาห์ กว่าจะคิดออก "กลีบรอบกุหลาบ"
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#50
23 มีนาคม 2016, 14:54
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Petals Around the Rose
is a mathematical puzzle in which the object is to work out the formula by which a number is derived from the roll of a set of five or six dice. It is often used as an exercise in inductive reasoning.[1] The puzzle became popular in computer circles in the mid 1970s,[2] particularly through an anecdote recounted in Personal Computing which depicts Bill Gates working out the solution in an airport.[3] Wikipedia
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#51
23 กุมภาพันธ์ 2021, 16:00
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The formula
The key to the formula is given by the name of the puzzle. The solution for a throw is found by counting the "petals around the rose", where a "rose" is any die face with a center dot. On a standard 6-sided die, this corresponds to the three odd facesโ1, 3, and 5. The rose's "petals" are the dots which surround the center dot. There is no rose on the 2, 4, or 6 faces, so these count as zero. There are no petals on the 1 face, so it also counts as zero. There are two petals and four petals on the 3 and 5 faces, respectively. Thus, the solution to a given throw can be found by: Adding the total petals, or; Starting with 2 times the number of dice that land on the 3 face and adding to it 4 times the number of dice that lands on the 5 face. In the example above, there is one 3 and one 5 face, so the result is two plus four, or six. https://en.wikipedia.org/wiki/Petals_Around_the_Rose
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