The number that replaces the question mark is 28. The series follows a pattern where the difference between consecutive numbers increases by two. • 12 - 7 = 5 • 19 - 12 = 7 • The next difference is 7+2=9. • Therefore, the missing number is 19+9=28. • The final difference confirms the pattern: 39−28=11, which is 9+2=11.
which number can replace both the questions marks in the series: 7, 12, 19, ?, 39
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Question context
This question is part of 📏 Arithmetic Aptitude within the broader 🧠 Aptitude Mastery subject and appears in the SPSC – Sindh Public Service Commission preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.