Find the missing number: 1, 3, 9, 27, 81, ______?
Find the missing number: 1, 3, 9, 27, 81, ______?
Explanation
The sequence follows a pattern of multiplying by 3:
1 × 3 = 3
3 × 3 = 9
9 × 3 = 27
27 × 3 = 81
81 × 3 = 243
This is a geometric sequence with a common ratio of 3.