Question

If you save ₹500 in the first month, ₹700 in the second month, ₹900 in the third month, and so on, what is the common difference of the A.P. \(500, 700, 900, 1100, \ldots\)?

Options

• ₹200

• ₹500

• ₹100

• ₹700

Answer 1

Each month the savings increase by a fixed ₹200, so \(d = 700 - 500 = ₹200\). The fixed number added to obtain each term from the previous term is called the common difference.