Multiple choice

Choose the correct alternative that will continue the same pattern and replace the question mark in the given series. $9, 27, 31, 155, 161, 1127, ?$

  1. $316$
  2. $1135$
  3. $1288$
  4. $2254$
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B Correct answer
Explanation

The pattern alternates between multiplication and addition: 9×3=27, then 27+4=31, then 31×5=155, then 155+6=161, then 161×7=1127. Following this pattern, the next operation is addition by 8: 1127+8=1135. The multipliers and addends increase by 1 each step (×3, +4, ×5, +6, ×7, +8).

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