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Golf for 6 2014-04-21
From barbara:
We are a group of 6 golfers. We play in groups of 3 for 5 days. How can I arrange the groups that everybody plays with everybody else at least once? Thanks.
Answered by Victoria West.
A schedule for 6 people 2014-03-29
From John:
How do I set up a schedule where six people are here for ten of twenty days. Arranged in rotating groups of three, so everyone works with everyone else. Everyone works with everyone else at least once and everyone works ten days.
Answered by Victoria West.
Group the addends so that you can add mentally 2013-10-01
From monica:
the questions in the homework says change the order or group the addends so that you can add mentally ,find the sum and tell which property you used 120+37+280 and 25+25+30
Answered by Penny Nom.
The range in grouped data 2012-08-27
From maria:
Question from maria, a student:

how to find range from group data.?i know that it is the difference between largest and smallest value.but confuse to find range of group data e.g

class interval frequency
0------5 6
5------10 7
10------15 9
15------20 4

Answered by Robert Dawson.
The intersection of normal subgroups 2012-08-13
From nokks:
let (G,*) BE A Group and prove that the intresection of normal subgroups of G is itself a normal subgroup of G
Answered by Penny Nom.
Six people divided into three groups of two 2012-07-09
From Fatima:
Six people call them A,B,C,D,E,F are randomly divided into three groups of two,find the probability of the below event(do not impose unwanted ordering among groups) E andF are in the same group I solved it but I have a doubt that it is wrong . My answer is 576 Please help to solve this problem.
Answered by Lorraine Dame and Penny Nom.
A loop 2010-05-05
From Amir:
what is loop theory in algebra?
Answered by Chris Fisher.
What is a group of three numbers within a larger number? 2008-12-16
From kim:
My daughter brought home a question for math homework. What is a group of three numbers within a larger number?
Answered by Robert Dawson and Harley Weston.
Grouping addends 2008-09-13
From juan:
how do you group the addends then find the sum: 2+4+6=
Answered by Penny Nom.
Small group activities 2008-02-11
From Rain:
I need to have a meet and greet with 40 people and need to do small group activities so that each person meets every other person but only once. I'm not into math, need someone to tell me how many groups I would need to have?
Answered by Victoria West.
The largest number you can add ... 2007-10-26
From Dryden:
What is meant by asking what is the greatest number you can add to that number without having to regroup in any place?
Answered by Penny Nom.
Number of real solutions 2007-10-05
From Sujith:
The no of real solutions of the equations 1+x+x^2+x^3 = x^4+x^5 is ?
Answered by Harley Weston.
A commutative subgroup 2007-05-03
From moulipriya:
If H be a commutative subgroup of a group G. Then can we say that G is also commutative?
Answered by Penny Nom.
A commutative group 2007-05-01
From moulipriya:
If G be a commutative group , and H be a proper subgroup of G. Then will H be always commutative?
Answered by Penny Nom.
Factor by grouping 2007-04-16
From Vincent:
How do you factor

the ( ) are exponents

4b4b(3)+ a(2)b - 4a - ab(4)

I still don't understand if there is no a in 4b4b

Answered by Penny Nom.
Which lets you put equal groups together? 2007-01-20
From Kathy:
Which lets you put equal groups together? division, multiplication, subtraction, estimation
Answered by Stephen La Rocque.
Statistics from grouped data 2003-10-09
From Rebecca:

I have to use a suitable computer package (ie. Excel) to work out the mean and standard deviation of the following:

 Price Range            No of Houses        No of Houses 
`000                  Area 1              Area 2   

45 and under 50         4                   5 
50 and under 55        7                   12 
55 and under 60        14                  16 
60 and under 70        19                  18 
70 and under 80        8                   3 
80 and under 100       5                   2 

I have used excel to work out mean and standard deviation before, but not in a more complicated example like this.

Any advice on where to start would be greatly appreciated.


Answered by Penny Nom.
Variance 2002-10-29
From Ade:
I am trying to solve a standard deviation question, I have 30 data points to use, should I group the data before solving for variance or should I just use the raw data.
Answered by Andrei Volodin.
Addends can be grouped differently but the sum does not change 2002-09-03
From Jodia:
I have been searching the web for over an hour & a half now for the answer to the following question:

The _____ states that addends can be grouped differently but the sum does not change.


Answered by Penny Nom.
What is a group of three numbers called in a large number? 2002-01-15
From Laurie:
What is a group of three numbers called in a large number?

My son has this question on his 4th grade worksheet. I've taught middle school math for 7 years and nver heard of it.


Answered by Paul Betts.
Factoring 2001-03-22
From Kaleena:
Factor this equation: 5x7-10x5+4x3-8x
Answered by Harley Weston.
 
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