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Simple Interest and Investment Calculations Quiz

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1. If the principal amount is $1000, the interest rate is 5%, and the time period is 2 years, what is the simple interest?

$100

Explanation

Simple interest = Principal × Rate × Time / 100 = $1000 × 5 × 2 / 100 = $100

2. A sum of $5000 is invested at an annual interest rate of 8%. How much interest will be earned after 3 years?

$900

Explanation

Interest = Principal × Rate × Time / 100 = $5000 × 8 × 3 / 100 = $900

10. An amount of $4500 is invested at a simple interest rate of 4%. How much interest will be earned after 2.5 years?

$540

Explanation

Interest = Principal × Rate × Time / 100 = $4500 × 4 × 2.5 / 100 = $540

15. If the time period is 5 years, the interest rate is 8%, and the simple interest is $800, what is the principal amount?

$8000

Explanation

Principal = Interest / (Rate × Time) = $800 / (8 × 5) = $8000

16. An amount of $2500 is invested at an annual interest rate of 3%. How much interest will be earned after 4.5 years?

$472.50

Explanation

Interest = Principal × Rate × Time / 100 = $2500 × 3 × 4.5 / 100 = $472.50

23. An amount of $3000 is invested at an annual interest rate of 4%. Calculate the total amount after 3 years, including interest.

$3480

Explanation

Total amount = Principal + Interest = $3000 + ($3000 × 4 × 3 / 100) = $3480

3. If the principal is $3000, the time period is 4 years, and the simple interest is $720, what is the annual interest rate?

Explanation

Rate = (Interest / (Principal × Time)) × 100 = ($720 / ($3000 × 4)) × 100 = 8%

4. An amount of $8000 is invested at an annual interest rate of 6%. Calculate the total amount after 2 years, including interest.

$8400

Explanation

Total amount = Principal + Interest = $8000 + ($8000 × 6 × 2 / 100) = $8400

6. A principal amount of $10,000 is invested at an annual interest rate of 7.5%. Calculate the simple interest after 5 years.

$3750

Explanation

Interest = Principal × Rate × Time / 100 = $10,000 × 7.5 × 5 / 100 = $3750

#10

9. If the time period is 8 years, the interest rate is 6%, and the simple interest is $960, what is the principal amount?

$2000

Explanation

Principal = Interest / (Rate × Time) = $960 / (6 × 8) = $2000

#11

12. An investment grows from $2000 to $2400 in 2 years. Calculate the annual interest rate.

10%

Explanation

Rate = ((Final Amount / Principal) - 1) / Time × 100 = (($2400 / $2000) - 1) / 2 × 100 = 10%

#12

14. A principal amount of $12,000 is invested at an annual interest rate of 6%. Calculate the total amount after 4 years, including interest.

$13,440

Explanation

Total amount = Principal + Interest = $12,000 + ($12,000 × 6 × 4 / 100) = $13,440

#13

5. If the simple interest for 1 year is $120 and the interest rate is 10%, what is the principal amount?

$1200

Explanation

Principal = Interest / (Rate × Time) = $120 / (10 × 1) = $1200

#14

7. If the simple interest is $180 and the principal amount is $3000, what is the time period in years?

Explanation

Time = Interest / (Principal × Rate) = $180 / ($3000 × Rate) = 3 years

#15

8. An investment of $6000 grows to $7200 in 3 years. Calculate the annual interest rate.

Explanation

Rate = ((Final Amount / Principal) - 1) / Time × 100 = (($7200 / $6000) - 1) / 3 × 100 = 8%

#16

11. If the principal is $8000, the time period is 3 years, and the simple interest is $960, what is the interest rate?

Explanation

Rate = (Interest / (Principal × Time)) × 100 = ($960 / ($8000 × 3)) × 100 = 5%

#17

13. If the simple interest is $75, the interest rate is 5%, and the time period is 3 years, what is the principal amount?

$1250

Explanation

Principal = Interest / (Rate × Time) = $75 / (5 × 3) = $1250

#18

18. A principal amount of $15,000 is invested at an annual interest rate of 4.5%. Calculate the simple interest after 6 years.

$4050

Explanation

Interest = Principal × Rate × Time / 100 = $15,000 × 4.5 × 6 / 100 = $4050

Simple Interest and Investment Calculations Quiz

1. If the principal amount is $1000, the interest rate is 5%, and the time period is 2 years, what is the simple interest?

2. A sum of $5000 is invested at an annual interest rate of 8%. How much interest will be earned after 3 years?

10. An amount of $4500 is invested at a simple interest rate of 4%. How much interest will be earned after 2.5 years?

15. If the time period is 5 years, the interest rate is 8%, and the simple interest is $800, what is the principal amount?

16. An amount of $2500 is invested at an annual interest rate of 3%. How much interest will be earned after 4.5 years?

23. An amount of $3000 is invested at an annual interest rate of 4%. Calculate the total amount after 3 years, including interest.

3. If the principal is $3000, the time period is 4 years, and the simple interest is $720, what is the annual interest rate?

4. An amount of $8000 is invested at an annual interest rate of 6%. Calculate the total amount after 2 years, including interest.

6. A principal amount of $10,000 is invested at an annual interest rate of 7.5%. Calculate the simple interest after 5 years.

9. If the time period is 8 years, the interest rate is 6%, and the simple interest is $960, what is the principal amount?

12. An investment grows from $2000 to $2400 in 2 years. Calculate the annual interest rate.

14. A principal amount of $12,000 is invested at an annual interest rate of 6%. Calculate the total amount after 4 years, including interest.

5. If the simple interest for 1 year is $120 and the interest rate is 10%, what is the principal amount?

7. If the simple interest is $180 and the principal amount is $3000, what is the time period in years?

8. An investment of $6000 grows to $7200 in 3 years. Calculate the annual interest rate.

11. If the principal is $8000, the time period is 3 years, and the simple interest is $960, what is the interest rate?

13. If the simple interest is $75, the interest rate is 5%, and the time period is 3 years, what is the principal amount?

18. A principal amount of $15,000 is invested at an annual interest rate of 4.5%. Calculate the simple interest after 6 years.

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