Which of the following numbers will replace the question mark (?) in the given series?
126, 147, ?, 189, 210, 231
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 168.
Given series: 126, 147, ?, 189, 210, 231
126 + 21 = 147
147 + 21 = 168
168 + 21 = 189
189 + 21 = 210
210 + 21 = 231
Hence, the correct answer is 168.