Find the next number in the series: 1, 3, 7, 15, 31, ?

  1. 62
  2. 63
  3. 57
  4. 74
Answer

B) 63

Rule: multiply by 2 then add 1. 31 2 + 1 = 63.

Quantitative Reasoning MCQ · More Number Series MCQs · Practise