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Interest (SI & CI)

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high importance~1 Q in Tier 122 formulas⚡ 15 shortcuts5 subtopics

Exam-level questions worked step by step. Try each one yourself first — then expand the solution and compare routes.

Q1.

Find the simple interest on ₹8,000 at 7.5% per annum for 4 years.

Q2.

Find the compound interest on ₹12,500 at 12% per annum for 2 years.

Q3.

Find the compound interest on ₹16,000 at 10% per annum for 112\frac{1}{2} years, interest compounded half-yearly.

Q4.

A sum of money becomes three times itself in 8 years at simple interest. The rate of interest per annum is:

Q5.

A man borrows ₹3,310 at 10% per annum compound interest and repays the loan in three equal annual instalments at the end of each year. Find the value of each instalment.

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