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Jabbar thought of a number, added 3 with it. Then he doubled the sum, he got 40. What was the original number?

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Jabbar thought of a number, added 3 with it. Then he doubled the sum, he got 40. What was the original number? Answer: 17

Question context

This question is part of 📏 Arithmetic Aptitude within the broader 🧠 Aptitude Mastery subject and appears in the ETEA Educational Testing and Evaluation Agency preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.