The least number of complete years in which a sum of money put out at 21% compound interest will be more than doubled is:

A

3 years

B

4 years

C

5 years

D

6 years

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Updated: 22 hours ago

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The price of cooking oil is reduced by 10%. A family buys 4 litres more for Tk. 720 after the reduction. What was the original price per litre?


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A

45 Tk/litre.


B

40 Tk/litre.


C

20 Tk/litre.


D

35 Tk/litre.


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What is the difference between simple and compound interest at 4% per annum on a sum of Tk. 25000 at the end of 2 years?

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A

Tk. 32


B

Tk. 40

C

Tk. 52

D

Tk. 60

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Find the rate of discount being given on a shirt whose selling price is Tk. 420 after deducting a discount of Tk. 80 on its marked price.


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A

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B

8%


C

16%


D

10%


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