Select the number from among the given options that can replace the question mark (?) in the following series.
53, 55, 58, 63, ?, 81
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 70.
Given series: 53, 55, 58, 63, ?, 81
53 + 2 = 55, 55 + 3 = 58, 58 + 5 = 63, 63 + 7 = 70, 70 + 11 = 81