Find the next number in the series: 10, 15, 25, 40, 60, ?

  1. 85
  2. 80
  3. 90
  4. 84
Answer

A) 85

Differences are 5, 10, 15, 20 — they change by 5 each time, so the next difference is 25: 60 + 25 = 85.

Quantitative Reasoning MCQ · More Number Series MCQs · Practise