Multiple choice

If a certain sum of money at simple interest amounts to Rs.5184 in 2 years and Rs.5832 in 3 years, what is the sum?

  1. Rs.3888

  2. Rs.4666

  3. Rs.5444

  4. Rs.6888
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A Correct answer
Explanation

In simple interest, the amount increases by the same interest each year. Interest for 1 year = Rs.5832 - Rs.5184 = Rs.648. Since 2 years amount is Rs.5184, principal + 2 years interest = 5184. So P + 2(648) = 5184, giving P = Rs.3888. This uses the constant annual interest property.

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