







Gauss' Addition of whole numbers. 
20180430 

Brad pose la question : I found this on your site. Question: what is the sum of the first 100 whole numbers??
Is there a different formula if the numbers begin at a number other than one? For example
What is the series I want to add is goes from 7  53? Harley Weston lui répond. 





2,0061234...484950 
20160924 

Mimi pose la question : Compute the following:
2,0061234…484950 Penny Nom lui répond. 





The sum of the first 50 terms of an arithmetic progression 
20140726 

Joshua pose la question : 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 Penny Nom lui répond. 





The sum of all whole numbers from 1 to X 
20130906 

Tim pose la question : 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 Penny Nom lui répond. 





A wire spiral 
20120107 

Pinar pose la question : 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 Penny Nom lui répond. 





The angles in an mgon and genrealizations 
20101016 

Michael pose la question : 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: Walter Whiteley lui répond. 





The middle term of an arithmetic sequence 
20081215 

Leigh pose la question : Find the sum of the first fifteen terms of an arithmetic series if the middle term is 92 Penny Nom lui répond. 





An augmented matrix 
20070213 

Mary pose la question : I've been trying for quite some time now to figure this out. I have to solve this by using the GaussJordan Method: 3x  y = 15 2x + 3y = 10 Can anyone help me? Penny Nom and Gabriel Potter lui répond. 





What is the sum of the first 100 whole numbers? 
20060531 

Jo pose la question : what is the sum of the first 100 whole numbers? Natasha Glydon, Paul Betts and Penny Nom lui répond. 





1+3+5+...+(2n+1) 
20040910 

Emma pose la question : Prove that 1+3+5+...+(2n+1)= (n+1)^{2} Penny Nom lui répond. 





The sum of some positive integers 
20040607 

A student pose la question : Find the sum of all positive integers not greater than 10000 that are divisible by neither 3 nor 7. Penny Nom lui répond. 





Constructions of polygons 
20030103 

Garrett pose la question : 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? Chris Fisher lui répond. 





Sums of evens 
20020914 

Rosa pose la question : How do I find a geometric way to easily compute sums of consecutive even numbers 2 + 4 + 6 + .... Leeanne Boehm and Harley Weston lui répond. 





The sum of the first one hundred even numbers 
20020910 

Arthur pose la question : What is the sum of the first one hundred even numbers? Penny Nom lui répond. 





Arithmetic progressions 
20020424 

David pose la question : I have been searching everywhere for the formula to mathamatical progression. Penny Nom lui répond. 





3, 6, 10, 15, 21 
20011129 

Patrick pose la question : we are trying to find the expression to solve for the nth term in the pattern 3, 6, 10, 15, 21 Denis Hanson lui répond. 





1+2+3+...+1000 
20011001 

Louise pose la question : Find a quick way to add all Intergers (whole Numbers) between 1 and 1000? Walter Whiteley lui répond. 





1 + 2 + 3 + ... + 50 
20000914 

Vicki Charron pose la question : How can you calculate the total of the numbers one through fifty, without adding up the individual numbers? Penny Nom lui répond. 

