15. The compound interest on a certain sum for 2 years at 10% per annum is Rs. 525. The simple interest on the same sum for double the time at half the rate percent per annum is:

A.The compound interest on a certain sum for 2 years at 10% per annum is Rs. 525. The simple interest on the same sum for double the time at half the rate percent per annum is:

B.Rs. 500

C.Rs. 600

D.Rs. 800

16. What is the rate of compound interest? I. The principal was invested for 4 years. II. The earned interest was Rs. 1491.

A.I alone sufficient while II alone not sufficient to answer

B.II alone sufficient while I alone not sufficient to answer

C.Either I or II alone sufficient to answer

D.Both I and II are not sufficient to answer

17. What will be compounded amount? I. Rs. 200 was borrowed for 192 months at 6% compounded annually. II. Rs. 200 was borrowed for 16 years at 6%.

A.I alone sufficient while II alone not sufficient to answer

B.II alone sufficient while I alone not sufficient to answer

C.Either I or II alone sufficient to answer

D.Both I and II are not sufficient to answer

18. An amount of money was lent for 3 years. What will be the difference between the simple and the compound interest earned on it at the same rate? I. The rate of interest was 8 p.c.p.a. II. The total amount of simple interest was Rs. 1200.

A.I alone sufficient while II alone not sufficient to answer

B.II alone sufficient while I alone not sufficient to answer

C.Both I and II are not sufficient to answer

D.Both I and II are necessary to answer

19. What is the rate of interest p.c.p.a.? I. An amount doubles itself in 5 years on simple interest. II. Difference between the compound interest and the simple interest earned on a certain amount in 2 years is Rs. 400. III. Simple interest earned per annum is Rs. 2000.

A.I only

B.II and III only

C.All I, II and III

D.I only or II and III only

20. What will be the compound interest earned on an amount of Rs. 5000 in 2 years? I. The simple interest on the same amount at the same rate of interest in 5 years is Rs. 2000. II. The compound interest and the simple interest earned in one year is the same. III. The amount becomed more than double on compound interest in 10 years.

A.I only

B.I and II only

C.I and III only

D.II and III only

21. Mr. Gupta borrowed a sum of money on compound interest. What will be the amount to be repaid if he is repaying the entire amount at the end of 2 years? I. The rate of interest is 5 p.c.p.a. II. Simple interest fetched on the same amount in one year is Rs. 600. III. The amount borrowed is 10 times the simple interest in 2 years.

A.I only

B.III only

C.I or II only

D.II and Either I or III only

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