Question 945542
<pre>
                1
              1   1
            1   2   1
          1   3   3   1
        1   4   6   4   1
      1   5  10  10   5   1
    1   6  <font color="red"><b>15  20</font></b>  15   6   1
  1   7  21  <font color="green"><b>35</font></b>  35  21   7    1  
1   8  28  56  70  56  28    8   1

Add the two red numbers, get the green number 

<font color="red"><b>15</font></b> + <font color="red"><b>20</font></b> = <font color="green"><b>35</font></b>

{{{red((matrix(2,1,6,2)))}}}{{{""+""}}}{{{red((matrix(2,1,6,3)))}}}{{{""=""}}}{{{green((matrix(2,1,7,3)))}}}

{{{red(6!/(2!(6-2)!))}}}{{{""+""}}}{{{red(6!/(3!(6-3)!))}}} {{{""=""}}} {{{green(7!/(3!(7-3)!))}}}

{{{red(6!/(2!4!))}}}{{{""+""}}}{{{red(6!/(3!3!))}}} {{{""=""}}} {{{green(7!/(3!4!))}}}

{{{red(720/(2*24))}}}{{{""+""}}}{{{red(720/(6*6))}}} {{{""=""}}} {{{green(5040/(6*24))}}}

{{{red(720/48)}}}{{{""+""}}}{{{red(720/36)}}} {{{""=""}}} {{{green(5040/144)}}}

{{{red(15)}}}{{{""+""}}}{{{red(20)}}} {{{""=""}}} {{{green(35)}}}

Edwin</pre>