2+2

4

5,10,15,20 geometrical sequence is

5

10, 20, 50 is it a geometrical sequence

No it is not because geometrical sequence is the same number that is used for all the numbers

2,6,10,14

4 is the geometrical sequence because that is what is there most

7,9,10

It is not a geometrical sequence

10,20,30,40

10

12,24,36,48

12 is the geometrical

20,40,60,80,100...

20 is the geometrical sequence

12,7,9,8,8

No

4,2,-1,-3

2 is the geometrical sequence