Answer:
243, 729
Explanation:
The pattern is to multiply the number by 3 to get to the next number
Example : 1 x 3 = 3 (second number), 3 x 3 = 9 (third number), 9 x 3 = 27 (fourth number)
Following the pattern, the next 2 numbers should be : 81 x 3 = 243, and 243 x 3 = 729