<PRE><B>Question 892571</B>
One series could be
A(n+1)=An*1/4 then A(n+2)=A(n+1)*2

100*1/4=25
25*2=50
50*1/4=12.5
12.5*2=25
25*1/4=6.25
6.25*2=12.5

so the next two could be
6.25 and 12.5

Another possibility
100    -75     100     -162.5  275
25     25      -62.5   112.5   275
50     -37.5   50      387.5
12.5   12.5    437.5
25     450.0
475
The sixth term could be 475

100    -75     100      -162.5 275     0
25     25      -62.5   112.5   275     0
50     -37.5   50      387.5   275
12.5   12.5    437.5   662.5
25     450     1100
475    1550
2025
7th term could be 2025
so the 6th and 7th terms could be 475 and 2025



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