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Building numbers |
2001-10-02 |
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Dorothy pose la question :
Using only the numbers 1, 2. 3 & 4 and the order of operations make problems that have the answers of 1 to 50. Use each digit only once per problem. Use +, -, x, (), exponents or use 2 digits to form a 2 digit number Example 1,2=21 or 12. No Division. We have been able to do all the problems except finding the answers of 7, 22, 31, 34, 42, 43 and 50.
Claude Tardif lui répond. |
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The median of a trapezoid |
2001-10-01 |
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Laura pose la question :
Given: A (1,2) B (9,-2) C (7,2) D (3,4) Find the endpoints of the median. Use exact values. Write the equation using the letters from the given trapezoid. Verify the theorem using algebra.
Penny Nom lui répond. |
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1+2+3+...+1000 |
2001-10-01 |
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Louise pose la question :
Find a quick way to add all Intergers (whole Numbers) between 1 and 1000?
Walter Whiteley lui répond. |
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Proof by induction |
2001-09-30 |
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Kyle pose la question :
I'm trying to learn induction and I need to see how this done please help with this problem... 20 + 21 + 22 +... + 2n = 2n+1 -1 is true whenever n is a positive integer.
Penny Nom lui répond. |
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Inverting a function |
2001-09-30 |
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Brandie pose la question :
Could you please tell me what is the basic guideline for inverting a function Example:
S(R)=2PiRal
V(R)=PiR(squared)bl
R(V)=?
Claude Tardif lui répond. |
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The 100 chart |
2001-09-28 |
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Nich pose la question :
Am I suppose to use the 100 chart for these questions. Question One:
I am a 2 digit number my tens digit is 2 more than my one digit my 1 digit is between 4 & 6. What # am I ? Question Two:
I am a 2 digit # I am greater than 40 but less than 60 my tens and ones digits are the same I am a odd number what am I ?
Penny Nom lui répond. |
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Solitaire |
2001-09-27 |
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Babahadj pose la question :
Il s'agit du probleme du solitaire avec des cases numerotees 1, 2 et 3. Un pion se trouve initialement sur chacune des cases, sauf la centrale qui est vide. Au depart, il ya 15 pions sur les cases avec le numero 1 , 15 pions sur des cases avec le numero 2, et 14 pions sur des cases avec le numero 3. Le seul mouvement pour un pion P consiste a manger un pion P' en sautant par dessus ce dernier , a condition que le pion P' soit situe sur une case voisine (horizontalement / verticalement) et que la case dans laquelle aboutit le pion P soit vide. En partant de cet etat initial , est - il possible d'arriver a un etat final avec un seul pion se trouvant sur une case portant le numero 1. Pourquoi? Merci de me repondre.
1 2 3
2 3 1
3 1 2
1 2 3 1 2 3 1 2 3
2 3 1 2 3 1 2 3 1
3 1 2 3 1 2 3 1 2
1 2 3
2 3 1
3 1 2
Claude Tardif lui répond. |
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1:5 |
2001-09-27 |
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Sandy pose la question :
A colleague and I have a disagreement about dilutions. I seem to remember that I was taught (although it was a long time ago) that a RATIO was written thusly: 1:5 , and read " one part to five parts", for a total of 6 parts. On the other hand, a fraction is written: 1/5 and is read" one part in five" for a total of 5 parts. My colleague says that the ratio reads "one part in five" and is essentially the same as a fraction. Which is right? Have I been doing dilutions wrong all this time? I teach Animal Nursing and need to know where I can find a consise answer to such questions for making up medicated fluids, etc.
Penny Nom lui répond. |
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A bag with 3 red marbles and |
2001-09-27 |
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Mike pose la question :
In a bag, there are 3 red marbles and "B" blue marbles. Two marbles are randomly selected from the bag without replacement. The probability that the two marbles are the same color is 0.5. Calculate the sum of all possible values of B.
Claude Tardif lui répond. |
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The triangle inequality |
2001-09-27 |
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A student pose la question :
__ __ __
Prove that AX + XB = AB for any X on AB.
Chris fisher lui répond. |
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Find the pattern |
2001-09-26 |
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A parent pose la question :
MY SON HAD ON A WORKSHEET WHAT I HAVE LISTED BELOW, BUT WE CAN'T SEEM TO FIND THE PATTERN. MOST THE TIME WE CAN, BUT THIS ONE IS DIFFERENT. 6,___, 9,____,____,_____,_____,_____
Caude Tardif lui répond. |
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Joan and Jan work together |
2001-09-26 |
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Karyna pose la question :
Joan and Jan work together and they set up a bandstand in just 24 minutes, but if Joan does it by herself she takes 1 hour. How long would it take Jan to set up the bandstand by himself?
Claude Tardif lui répond. |
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Bicycles and tricycles |
2001-09-26 |
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Sally pose la question :
A bicycle shop has 5 bicycles and tricycles to repair. They have 12 wheels. What strategy would you use to determine how many bicycles and tricycles need to be repaired?
Claude Tardif, Diane Hanson and Penny Nom lui répond. |
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Scoring a college placement test |
2001-09-26 |
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Carmen pose la question :
A college placement test consist of 75 multiple-choice questions, each having 5 possible answers. The exam is scored by subtracting from the number of correct answers one-quarter of a point for each question answered incorrectly. If a person answers every question on the exam and scored 45, how many questions were answered wrong?
Penny Nom lui répond. |
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Investing in a yacht |
2001-09-26 |
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Junior pose la question :
Marvin and his four friends wish to invest in a yacht by sharing equally in the cost. As the date of sale approaches, Marvin realizes that if three more people join the partnership, each partner's share would decrease by $18,000. How much does the yacht cost?
Penny Nom lui répond. |
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