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Place six numbers around a triangle |
2002-07-19 |
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Monika pose la question : I need to place six numbers around a triangle, as such that one number is on each corner, and one number on each side making three numbers in one line, adding up to two hundred exactly. The number I have to use are, 40, 50, 60, 70, 80, 90. I have to use each one once, there for, each number cannot be repeated. Claude Tardif and Chris Fisher lui répond. |
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Can you make up a word that adds up to 1000000? |
2002-07-19 |
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Adrie pose la question : My question is elementary and I am a student Please help me with the following conundrum, as it is driving me crazy.
'When the letters in the alphabet are given values from 1 to 26 for A to Z, can you make up a word that adds up to 1000000 ( one million )-used as a multiplication?'
Like 'cat' would be 3*1*20 = 60 Claude Tardif lui répond. |
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Order of operations |
2002-07-18 |
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Danna pose la question : I would like to know how to solve this type of problem; I already have the answer. Problem: 2 [5 (4 + 6) - 2] = 96 Also, what do you call this type of problem? Thanks a lot. Penny Nom lui répond. |
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Division by zero |
2002-07-18 |
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James pose la question : Why is division by zero undifined (i have to proof that division by zero is undifined) Chris Fisher lui répond. |
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A rope around a post |
2002-07-15 |
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Nic pose la question : My daughter who is in the 10th grade asked me this ?, you have a pole 45 inches high, 22inches around. You have a rope 1/2 thick, how many feet of rope would you use to go from top bottom of pole to top. Penny Nom lui répond. |
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A probability problem |
2002-07-12 |
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Yvonne pose la question : What is the probability of 38 people choosing the same five options, given a choice of 15? Perhaps you could just give me the formula with an explanation. I am an English teacher doing educctional research, but am stuck because I don't have the math experience to help me. Andrei Volodin lui répond. |
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Two cubes |
2002-07-12 |
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Vanessa pose la question : The edges of a cube are 50% as long as the edges of another cube. What percent of the volume of the larger cube is the volume of the smaller cube? Peny Nom lui répond. |
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Pigs in pens |
2002-07-10 |
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Shannon pose la question : A farmer has 21 pigs and 4 pens, he must put an odd number of pigs in each pen, how does he do it? Penny Nom and Chris Fisher lui répond. |
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The Praxis II test |
2002-07-09 |
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A student pose la question : I am taking the Praxis II test and I can't seem to answer certain styles of questions. Please help!!!!!! - In a class of 29 children, each of 20 children has a dog and each of 15 has a cat. How many of the children have both a dog and a cat?
- If there are exactly 5 times as many children as adults at a show, which of the following CANNOT be the number of people at the show? a. 102 b. 80 c. 36 d. 30
- In order to estimate the population of snails in a certain woodland, a biologist captured and marked 84 snails there were then released back into the woodland. Fifteen days later the biologist captured 90 snails from the woodland, 12 of which bore the markings of the previously captured snails. If all of the marked snails were still active in the woodland when the second group of snails were captured, what should the biologist estimate the snail population to be based on the probabilities suggested by this experiment? a. 630 b. 1,010 c. 1040 d. 1080.
Paul Betts lui répond. |
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A polygon inscribed within an ellipse - Part 2 |
2002-07-08 |
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Steven pose la question : I recently sought your advice about a problem that I have been working on for eight years or so concerning a polygon inscribed within an ellipse. I think that I may have confused matters by the way in which I put the question and hope that the enclosed diagram will clear matters up. In the ellipse below I have drawn three chords inscribed within one quadrant ( this would pertain to a twelve sided figure within the whole ellipse). These chords are exactly the same length as each other, for example if the major axis of the ellipse was 360 and the minor axis 240 I have worked out that a twelve sided figure would have sides of 78.2487. However I worked this out empirically with a method that could only be described as gruelling I would be most grateful if you could tell me of a method that would work for any ellipse and any number of sides. Chris Fisher lui répond. |
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The base 10 multipliction table |
2002-07-07 |
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A student pose la question : These are two questions from Math for Elementary Teachers and they have me stumped. You have two coins that are worth 30 cents. One of the coins is not a nickel. What are the two coins? The product of the diagonals of any 2x2 matrix in the base 10 multiplication table are equal. Why? Penny Nom lui répond. |
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A box that holds 22.4 liters |
2002-07-07 |
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Jon pose la question : How do I find the measurements required to make a box that holds 22.4 liters of something? Penny Nom lui répond. |
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Equivalence relations on a set of cardinality n |
2002-07-06 |
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Siddhartha pose la question : what is the no. of equivalence and transitive relations on a set of cardinality n? Penny Nom lui répond. |
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An equalateral polygon inscribed within an ellipse |
2002-06-30 |
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Steven pose la question : How would you calculate the length of one of the sides of an equalateral polygon (of n sides) inscribed within an ellipse ( of any eccentricity ) where all of the vertices exactly touch the perimeter of the ellipse? I know that when the eccentricity is zero ( i.e a circle ) the formula: r * (sin(180/n) * 2) will suffice. But what about when the eccentricity is greater than zero? Chris Fisher lui répond. |
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Math test |
2002-06-28 |
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Dustin pose la question : I have a really important placement test to take in 2 weeks. I need to have a strong comprehension of algebra and I have't taken a math class in about for years. I'm 24 and am going back to school. I want to get ahead and into math 96, and must pass this test to do that. Do you know of a book or a wab site that can teach me a few formulas that will give me the edge I need. If I have the right text for the job i'll study day and night to pass. Leeanne Boehm lui répond. |
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