Which of the following numbers will replace the question mark (?) in the given series?
7, 8, 8, 51, 140,?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. 825.
Given series: 7, 8, 8, 51, 140,?
The series follows this pattern:
7 × 1 + 13 = 7 + 1 = 8
8 × 2 - 23 = 16 - 8 = 8
8 × 3 + 33 = 24 + 27 = 51
51 × 4 - 43 = 204 - 64 = 140
140 × 5 + 53 = 700 + 125 = 825
So, the next term in the series is 825.