Select the number from among the given options that can replace the question mark (?) in the following series.
23, 25, 75, 79, 395, 401, ?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 2807.
Given series: 23, 25, 75, 79, 395, 401, ?
23 + 2 = 25; 25 × 3 = 75; 75 + 4 = 79; 79 × 5 = 395; 395 + 6 = 401; 401 × 7 = 2807