Multiple choice

Choose the correct alternatives from given one that will complete the series. 233, 214, 231, 218, 229, ?, 227

  1. 220

  2. 222

  3. 224

  4. 221
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The series alternates with decreasing differences: -19, +17, -13, +11, -9, +7. Starting from 233: 233-19=214, 214+17=231, 231-13=218, 218+11=229, 229-9=220, 220+7=227. But wait, the series shows 229, ?, 227. So 229-9=220 (but we need to get to 227). Let me recheck. Actually: 233-19=214, +17=231, -13=218, +11=229, then -7=222, +5=227. The pattern is alternating subtraction and addition with odd numbers decreasing.

Keep practicing — related questions