Which of the following numbers will replace the question mark (?) in the given series?
9, 45, 180, ?, 1080, 1080
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 540.
Given series: 9, 45, 180, ?, 1080, 1080
9 × 5 = 45; 45 × 4 = 180; 180 × 3 = 540; 540 × 2 = 1080; 1080 × 1 = 1080