Which of the following numbers will replace the question mark (?) in the given series?
7, 27, 87, 267, 807, ?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 2427.
Given series: 7, 27, 87, 267, 807, ?
7 × 3 + 6 = 27; 27 × 3 + 6 = 87; 87 × 3 + 6 = 267; 267 × 3 + 6 = 807; 807 × 3 + 6 = 2427