Page 127 - ICSE Math 7

PRACTICE TIME

1. Find the principal that will amount to ` 935 at the rate of 5% p.a. in 2 years.

2. Find the rate per cent per annum at which ` 1,700 will amount to ` 2,074 in 4 years.
3. A sum of money doubles itself in 6 years. In how much time will it become thrice at the same
rate of interest?
4. Sia invested ` 3,600 and ` 4,800 at the same rate of interest, for 1 year and received ` 40 more
in one case than in the other. Find the rate of interest.
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5. Find the interest on ` 11,680 from 15 January 2005 to 15 February 2006 at the rate of 3 % p.a.
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6. A sum of money amounts to ` 2,000 in 5 years and the interest is of the principal. Find the
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principal and the rate of interest.
7. What sum of money lent out at 6% p.a. for 2 years will give the same interest as ` 1,800 lent out
at 5% p.a. for a year?
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8. In how much time will the interest be of the principal at 8% p.a.?
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9. A sum of money invested at 9% p.a. amounts to ` 1,160 in 5 years. How much would it amount
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to in 7 years at 11 % p.a.?
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10. Tarun took a loan from a bank at 2% p.a. After some time, he paid back the loan by paying
` 77,000. If the interest was ` 7,000, find the time period of the loan.

THINK SMART

1. Tanya took a loan of ` 50,000 for 5 years. She returned ` 10,000 each year to overcome the
amount of loan and paid interest annually at the rate of 10% per annum. How much extra amount
did she pay back?
2. A sum of money amounts to ` 4,480 at 6% simple interest per annum at the end of 2 years. Find
the principal.

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