HARD
8th Foundation
IMPORTANT
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A doctor wants to divide ₹1,45,000 between his son and daughter who are 12 years and 14 years, respectively, in such a way that the sum invested at the rate of 1212% per annum compounded annually will give the same amount to each, when they attain 16 years. How Should he divide the sum

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Important Questions on Simple Interest and Compound Interest

MEDIUM
8th Foundation
IMPORTANT
Pearson IIT Foundation Mathematics Class 8>Chapter 6 - Simple Interest and Compound Interest>PRACTICE QUESTIONS COMPETITION WING>Q 61
Given that Carbon-14 (C14) decays at a constant rate in such a way that it reduces to 20% in 1562 years. The age of a wooden piece in which the carbon & only 4% of the original is
MEDIUM
8th Foundation
IMPORTANT
Pearson IIT Foundation Mathematics Class 8>Chapter 6 - Simple Interest and Compound Interest>PRACTICE QUESTIONS COMPETITION WING>Q 62
₹2800 was split into two parts. One part was lent at 20% per annum simple interest for 10 years. The other part was lent at 25% per annum simple interest for 20 years. Each part yielded equal interest. Find the lower part (in₹)
MEDIUM
8th Foundation
IMPORTANT
Pearson IIT Foundation Mathematics Class 8>Chapter 6 - Simple Interest and Compound Interest>PRACTICE QUESTIONS COMPETITION WING>Q 63
₹6000 was lent at compound interest for 2 years. The rates of interest for the first and second years were 10% per annum and 30% per annum, respectively. If the rate of interest each year had been 20% per annum. then the additional amount obtained would have been (in ₹)
EASY
8th Foundation
IMPORTANT
Pearson IIT Foundation Mathematics Class 8>Chapter 6 - Simple Interest and Compound Interest>PRACTICE QUESTIONS COMPETITION WING>Q 64

The cost of a car depreciates 10% every year over the previous year. If a person sells his car at a profit of 10% at ₹3,20,760, then find the price of the car 3 years ago.

MEDIUM
8th Foundation
IMPORTANT
Pearson IIT Foundation Mathematics Class 8>Chapter 6 - Simple Interest and Compound Interest>PRACTICE QUESTIONS COMPETITION WING>Q 65
Govind has two sons. Their ages are 10 years and 8 years. He plans to invest a total of 1.22 lakh in the names of the two sons at 20% per annum compound interest. Those sums had to be such that when the sons attained the age of 18 years, they would receive equal amounts. How much does he plan to invest in the name of his older son (in lakhs of rupees)?