sum of numbers

[Kwhit]

Investigate the sum of the numbers in each row of this triangle.
Find a way to predict the sum of the numbers in the 10th, 20th and 100th rows.

Explain your rule

1
3 + 5 = 8
7 + 9 + 11 = 27
13 + 15 + 17 + 19 = 64
21 + 23 + 25 + 27 + 29 = 125

 

[lookagain]

Investigate the sum of the numbers in each row of this triangle.
Find a way to predict the sum of the numbers in the 10th, 20th and 100th rows.

Explain your rule

1
3 + 5 = 8
7 + 9 + 11 = 27
13 + 15 + 17 + 19 = 64
21 + 23 + 25 + 27 + 29 = 125

Kwhit, please read the "Read-Before-Posting" link below. This includes sharing your own work on here first,

before helpers give you advice, so that they can help you know where you are stuck.


http://www.freemathhelp.com/forum/threads/77972-Read-Before-Posting!!



Look what I wrote in the quote box. Those sums are consecutive perfect cubes.