If 25% of a certain number is 1600, what is 10% of the number?

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If 25% of a certain number is 1600, what is 10% of the number? Answer: 640

Question context

This question is part of 📏 Arithmetic Aptitude within the broader 🧠 Aptitude Mastery subject and appears in the PPSC Punjab 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.