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math puzzle |
2007-11-29 |
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Will pose la question :
This is a math puzzle called "What's my number"
1. It is a three-digit whole number.
2. It is a square number.
3. It is divisible by 5.
4. it is not an even number.
5.Each of it digit is not different.
6. It is divisible by 9.
7.It is less than 500.
8. Its ones digit is 5.
9.It has only one odd digit.
10. Its tens digit is less than its ones digit.
Leeanne Boehm lui répond. |
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(32-2 x 5) divided by 2 + 8 |
2007-11-28 |
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Kim pose la question :
Solve
(32-2 x 5) divided by 2 + 8
Leeanne Boehm lui répond. |
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An arched entry |
2007-11-28 |
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amber pose la question :
i am working with an arched entry. i know that the radius is 25' and the height is 20'-11". i need to know the length of the arch and degree of bend of the arch. how do i find these?
Stephen La Rocque lui répond. |
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Percent change between two value ranges |
2007-11-28 |
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Joe pose la question :
How do you calculate a percent change between tow value ranges - for instance if I project a range for 2007 to be between 100 and 120 and a range for 2008 to be between 120 and 140, how do I calculate the estimated increase between the range? Is it 0% to 40% (taking the two inside values rto calculate the minimum and the two outside values rto calculate the maximum?)
Harley Weston lui répond. |
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A trig identity |
2007-11-28 |
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Julia pose la question :
sin4x 1 - cos2x
------------ x ---------- = tanx
1 - cos4x cos2x
Harley Weston lui répond. |
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A square near 522 |
2007-11-28 |
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ali pose la question :
What a way to know the smallest number could blow number 522 to become fully square
Penny Nom lui répond. |
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Powers of 2 |
2007-11-28 |
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Kim pose la question :
Complete the following:
2 to the power of 4=
2 to the power of 3=
2 to the power of 2=
2 to the power of 1=
If the pattern continues, 2 to the power of 0 =
Penny Nom lui répond. |
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O,T,T,F,F,S,S,?,?,? |
2007-11-28 |
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Kim pose la question :
What are the next 3 letters in this sequence?
O,T,T,F,F,S,S,?,?,?
Stephen La Rocque lui répond. |
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Multiplying an inequality by a negative number |
2007-11-27 |
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Lisa pose la question :
Why is it that you have to switch the sign of the inequality when you divide or multiply by an negative number to solve for a variable?
Penny Nom and Walter Whiteley lui répond. |
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The probability of an odd number |
2007-11-27 |
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Malonda pose la question :
Suppose you select a 3-digit number at random from the set of all positive 3-digit numbers. Find each probability.
P(odd numbers)
Stephen La Rocque lui répond. |
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Addends |
2007-11-27 |
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jessica pose la question :
what is a addends my son needs to write a number sentence that has two addends that are the same
Stephen La Rocque lui répond. |
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A math riddle |
2007-11-27 |
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Kathleen pose la question :
My 4th grade daughter was given a math riddle which she is expected to answer using a problem solving strategy. The question is:
The number of my hundreds and the number of my thousands is 3. The number of my tens is 7 times the number of my thousands. All my digits are different. What am I?
I have tried to come up with an answer, but am beginning to think it is less complicated than what I have come up with.
Stephen La Rocque lui répond. |
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Direct and inverse variations |
2007-11-27 |
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Julie pose la question :
Please Help I do not understand this question. X varies directly as the square of S and inversely as T. How does X change when S is doubled ? When both S and T are doubled ? I appreciate your help with this problem.
Stephen La Rocque lui répond. |
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A=B+C+D+F+G+H+J |
2007-11-27 |
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Boubendir pose la question :
voila ma question et comme savoir les nombres additioné en etulisant le resultat
A=B+C+D+F+G+H+J
au debut ons a les B,C,D,F,G,H,J on connaissent leur valeur comment retrouver
valeur on etulisant leur resultat
Claude Tardif lui répond. |
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How many cubes have one face painted red? |
2007-11-27 |
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Ashutosh pose la question :
A rectangular block measuring 10 units by 8 units by 6 units is made up of cubes measuring 1 unit on a side. The base of the block is 10 units by 8 units. The outside of the block other than the base is painted red. How many of the unit cubes have exactly one face painted red?
Stephen La Rocque and Penny Nom lui répond. |
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