Describe the pattern in the numbers. write the next number in the pattern

2,6,18,54 ...

-12,-8,-4,0 ...

3,-9,27,-81, ...

The pattern in the first set of numbers is times 3, to find the next number multiply 54 by 3 to get 162.

The pattern in the second set of numbers is plus 4, to find the next number add 4 to 0 to get 4.

The pattern in the last set of numbers timed - 3, to find the next number multiply - 81 by - 3 to get 243.