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The Euclidean Algorithm |
2002-01-31 |
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Murray pose la question : Can you please explain to me why the euclidean algorithm works? Penny Nom lui répond. |
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Baseball and sit ups |
2002-01-31 |
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A student pose la question : A baseball team won 8 more games than it lost. If it played 56 games, how many games did it win? On the first day of practice, Paul did 3 sit ups. On the second day he did 5, and on the the third day he did 8, and on the fourth day he did 12. If this pattern continued, how many sit-ups did ihe do on the sixth day of practice? Penny Nom lui répond. |
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The size of a lot |
2002-01-26 |
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Claudia pose la question : I own a piece of property that I need to know the square feet for assessment purposes. The figure they came up with is wrong. They measured from one point to another and halved the sums but that means I own the cul de sac and we don't. My lot is 55 feet wide and one side is 108.96 feet and the other side is 146.04 that extends all the way to a circle. The front of the lot on the cul de sac is stated on the survey like this. 78.21 feet where R=40 feet. This large arc is taken off the size of our land. How many square feet is our lot. Harley Weston lui répond. |
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Logico mathematical knowledge |
2002-01-23 |
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A teacher pose la question : How does young children's logico mathematical knowledge develop? Walter Whitely lui répond. |
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Adding algebraic fractions |
2002-01-23 |
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Francine pose la question :
Hello, I've come up with an answer for the following problem but it's not the same as the book's answer. However, the book has a lot of mistakes in it and I don't know if I'm doing it properly or not. Your help would be soooo appreciated. It's driving me crazy.The problem is:
2 + 3 + 4
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(x-1)^3 (x-1)^2 (x-1)
[(x-1)^3 is (x-1) to power of 3 etc.] Penny Nom lui répond. |
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Some trig problems |
2002-01-22 |
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Grant pose la question :
Solve each problem for theta(there is no sign on my computer)for 0 is less than or equal to theta which is less less than 360 - 2cosx-1=0
cosx=1/2 Anwser 60,300
- tanx-2sinxtanx=0
tanx(-2sin+1)=0 (factor ?) tanx=0 and sin= 1/2 (solve from there?)
- 2sinx-cscx=0
2sinx-1/sinx=0 3sinx-1=0 3sinx=1/3(?)
- 4cos(2x)+2cosx= -1
8cosx+2cosx+1=0 10cosx+1=0 10cosx= -1/10 (?)
- cos(2x-30)=1/2
cos2x-cos30=1/2 cos2x-cos30-1/2=0 i don`t know what to do know
- Sinx+cosx=0
Square both sides? Claude Tardif lui répond. |
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Miles and kilometers |
2002-01-22 |
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Dennis pose la question : I'm in the middle of purchasng a vehicle and it was built in Canada. Therefore it is in kilometers and not in miles. I forgot how many kilometers are in a mile. It registers as 183,049 kilometers. Penny Nom and Judi McDonald lui répond. |
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Normal distribution |
2002-01-21 |
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Danielle pose la question : A teacher gave a test on which the students' marks were normally distributed, but the results were pathetic. The mean was 52% and the standart deviation was 12%. The teacher decided that the top 10% of the students should get A's, the next 20% should get B's, the next 40% should get C's, the next 20% should get D's, and the bottom 10% should get F's. To the nearest percent, what are the cutoff marks that will result in an A, B, C, D, and F? Penny Nom lui répond. |
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Successive differences |
2002-01-20 |
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Linsey pose la question : what is the rule for working out the formula for a sequence with three lines of difference? eg.
1, 3, 7, 15, 29
1st line differences: 2, 4, 8, 14
2nd line differences: 2, 4, 6
3rd line differences: 2, 2 Penny Nom lui répond. |
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Rolling 5 sevens before rolling a six or an eight |
2002-01-20 |
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Tony pose la question : When rolling 2 dice, what is the probability of rolling 5 sevens before rolling a six or an eight? Andrei Volodin and Penny Nom lui répond. |
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The distance across a circle |
2002-01-18 |
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Douglas pose la question : If you know how far around a circle is (say earth) 25000 miles how do you calculate the distance across? Penny Nom lui répond. |
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Making 24 |
2002-01-17 |
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Renee pose la question : My 4th grade daughter and I need to find a simple math sentence using 5, 5, 3, & 7 to equal 24. You can add, subtract, divide or multiple. Penny Nom lui répond. |
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A sale on eggs |
2002-01-17 |
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A student pose la question : A store had a sale on eggs, selling 13 eggs for the usual price of a dozen eggs. As a result, the price of the eggs was reduced by 4 cents a dozen. What is the original price for a dozen eggs? Penny Nom lui répond. |
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My salary is doubled everyday for 30 days |
2002-01-17 |
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Kanishk pose la question : I recieve 1 penny the 1st day, 2 pennies the 2nd day, and my salary is doubled everyday for 30 days. How much money will I have by the end of the 30 day time period? (Is there a way of solving this problem without a chart?) Penny Nom lui répond. |
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A sequence |
2002-01-16 |
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Chris pose la question : I have spent two days trying to determine the pattern to the following set of numbers: 1,4,9,1,6,2,5,3,6,4,9,6,4,8,1,____. I need the next four numbers to the sequence. Claude Tardif lui répond. |
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