Thursday
December 18, 2014

Homework Help: Math Block Problem

Posted by Anonymous on Tuesday, September 13, 2011 at 8:40pm.

A child organizes animal blocks in rows on the ground. There are 64 animal blocks in the 5th row & 92 of those blocks in the 9th and last row. Suppose that the number of animal blocks frm row to row form an arithmetic sequence.

The number of animal blocks in the first row is....

I canít seem to find a pattern, having a hard time solving this problem too.
Also How do I find the total number of blocks used in the arrangement?

The answer somehow is 36, and the total number of blocks is 576. I dont know how to get this.

Im probably supposed to use one of these formulas... Sn = n[2a +(n-1)d]/2
Sn = n(a +tn)/2. Still I dont get how to do it

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