Which number will replace the question mark (?) in the following series?
729, 243, ?, 27, 9, 3
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 81.
The series follows this pattern:
3 × 3 = 9, 9 × 3 = 27, 27 × 3 = 81, 81 × 3 = 243, 243 × 3 = 729