Select the number from among the given options that can replace the question mark (?) in the following series.
4, 7, 21, 24, 72, 75,?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 1, i.e., 225.
4 + 3 = 7, 7 × 3 = 21, 21 + 3 = 24, 24 × 3 = 75, 75 × 3 = 225