Which of the following numbers will replace the question mark (?) in the given series?
192, 185, 171, ?, 122, 87
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 150.
192 - 7 = 185
185 - 14 = 171
171 - 21 = 150
150 - 28 = 122
122 - 35 = 87
Hence, the correct answer is "150".