What best completes this sequence 1 5 17 53 161?

Answer 1

To get the number to complete the sequence, multiply the first number to 3 and then add 2 to get the next number. Given 1, 5, 17, 53, 161 ____

Solution:

1 x 3 (+2) = 5

5 x 3 (+2) = 17

53 x 3 (+2) = 161

161 x 3 (+2) = 485

Therefore, the number to complete the sequence is 485.