What number will come next in this number series 2, 6, 18, 54, .... ?

Answer 1

Here the series goes as follows
2
6 ==> 2 + 4*3^0
18 ==> 6 + 4*3^1
54 ==> 18 + 4*3^2

Therefore the final term is 54 + 4*3^3 = 162