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2,006-1-2-3-4-...-48-49-50 2016-09-24
From Mimi:
Compute the following:

2,006-1-2-3-4--48-49-50

Answered by Penny Nom.
The sum of the first 50 terms of an arithmetic progression 2014-07-26
From Joshua:
Hello ...my is Joshua...I'm a grade 11 student...I got a question

Calculate the sum of the first 50 terms of an arithmetic progression: 112:98:84

Answered by Penny Nom.
The sum of all whole numbers from 1 to X 2013-09-06
From Tim:
How do I develop a rule for the sum of all whole numbers from 1 to X when I have no idea how to do this
Answered by Penny Nom.
A wire spiral 2012-01-07
From Pinar:
I am trying to help my daughter with very challenging maths questions which sometimes I get stuck If someone help me with one of them I would appreciate it.

Jane is making a spiral out of wire. She bends the wire after 1 cm, then bends the wire after 2cm, then 3cm and continues in this manner. After 4 bends she used 15 cm of wire For each bend how many cm wire was used? After 6 bends how many cm wire will she have used? How many bends will she have made if she uses 66 cm of wire?

I would appreciate if somebody would help me with this.

Thank you!
Pinar

Answered by Penny Nom.
The angles in an m-gon and genrealizations 2010-10-16
From Michael:
Hello: In answer to a student's question, someone named Penny from your organization provided a proof that the sum of the interior angles of a triangle in the plane is pi radians (or 180 degrees).

I am interested (and I'm sure many other people would be too) in 3 potential generalizations of this basic fact in plane geometry:

Answered by Walter Whiteley.
The middle term of an arithmetic sequence 2008-12-15
From Leigh:
Find the sum of the first fifteen terms of an arithmetic series if the middle term is 92
Answered by Penny Nom.
An augmented matrix 2007-02-13
From Mary:
I've been trying for quite some time now to figure this out. I have to solve this by using the Gauss-Jordan Method: 3x - y = 15 2x + 3y = 10 Can anyone help me?
Answered by Penny Nom and Gabriel Potter.
What is the sum of the first 100 whole numbers? 2006-05-31
From Jo:
what is the sum of the first 100 whole numbers?
Answered by Natasha Glydon, Paul Betts and Penny Nom.
1+3+5+...+(2n+1) 2004-09-10
From Emma:
Prove that 1+3+5+...+(2n+1)= (n+1)2
Answered by Penny Nom.
The sum of some positive integers 2004-06-07
From A student:
Find the sum of all positive integers not greater than 10000 that are divisible by neither 3 nor 7.
Answered by Penny Nom.
Constructions of polygons 2003-01-03
From Garrett:
Our teacher just finished the constructions unit, and he mentioned briefly about odd sided figures such as pentagons and septagons, only that they're very hard. My question is, how do you draw, with a compass and a straight edge, a pentagon and septagon?
Answered by Chris Fisher.
Sums of evens 2002-09-14
From Rosa:
How do I find a geometric way to easily compute sums of consecutive even numbers 2 + 4 + 6 + ....
Answered by Leeanne Boehm and Harley Weston.
The sum of the first one hundred even numbers 2002-09-10
From Arthur:
What is the sum of the first one hundred even numbers?
Answered by Penny Nom.
Arithmetic progressions 2002-04-24
From David:
I have been searching everywhere for the formula to mathamatical progression.
Answered by Penny Nom.
3, 6, 10, 15, 21 2001-11-29
From Patrick:
we are trying to find the expression to solve for the nth term in the pattern

3, 6, 10, 15, 21


Answered by Denis Hanson.
1+2+3+...+1000 2001-10-01
From Louise:
Find a quick way to add all Intergers (whole Numbers) between 1 and 1000?
Answered by Walter Whiteley.
1 + 2 + 3 + ... + 50 2000-09-14
From Vicki Charron:
How can you calculate the total of the numbers one through fifty, without adding up the individual numbers?
Answered by Penny Nom.
 
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