Question 1187183
.
<pre>

To solve the problem, I make this table of three lines.


The upper line counts weeks.

Middle line shows the number of new members to join (the increment).

The lowest line shows current total members.



week                 0               1         2         3         4


new members          1               2      3*2 = 6    9*2=18    27*2=54
to join
                 Freda herself


total current
number of members    1             1+2=3     3+6=9     9+18=27   27+54=81     <<<---===  <U>ANSWER</U>
</pre>

Solved.


-------------


From the solution, &nbsp;you see that if this scheme works, &nbsp;it triples the number of members each week.