Select the number from among the given options that can replace the question mark (?) in the following series.
13, 26, 39, 52, 65, ?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 78.
Given series: 13, 26, 39, 52, 65, ?
13 × 2 = 26, 13 × 3 = 39, 13 × 4 = 52, 13 × 5 = 65, 13 × 6 = 78