Select the number from among the given options that can replace the question mark (?) in the following series.
24, 30, 39, 51, 66, 84, ?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 105.
Given series: 24, 30, 39, 51, 66, 84, ?
24 + 6 = 30; 30 + 9 = 39; 39 + 12 = 51; 51 + 15 = 66; 66 + 18 = 84; 84 + 21 = 105