K Kwhit New member Joined Sep 5, 2013 Messages 6 Sep 30, 2013 #1 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 Last edited by a moderator: Oct 1, 2013
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
L lookagain Elite Member Joined Aug 22, 2010 Messages 3,249 Sep 30, 2013 #2 Kwhit said: 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 Click to expand... 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. Last edited: Sep 30, 2013
Kwhit said: 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 Click to expand... 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.
