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Shakila's money box holds 100, 150, 200, 250 rupees on successive birthdays. The common difference is:

A50
B40
C60
D25
Answer & Solution
Correct answer: A. 50
1. Subtract each term from the next. 2. 150 minus 100 is 50, and so on. 3. The common difference is 50. _Source: syllabus Mathematics, Chapter 5, Arithmetic Progressions._
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