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Practice Questions
Note: You can add tough questions into your favourite list for second revision. 
Rs. 20 is the true discount on Rs. 260 due after a certain time. What will be the true discount on the same sum due after half of the former time, the rate of interest being the same ?  
A.  Rs. 10 [Wrong Answer] 
B.  Rs. 10.40 [Correct Answer] 
C.  Rs. 15.20 [Wrong Answer] 
D.  Rs. 13 [Wrong Answer] 
View Answer
Explanation:
Answer : B Discuss it below :S.I. on Rs. (260  20) for a given time = Rs. 20. S.I. on Rs. 240 for half the time = Rs. 10. T.D. on Rs. 250 = Rs. 10. T.D. on Rs. 260 = Rs. Click here for more comments 
A has to pay Rs, 220 to B after 1 year. B asks A to pay Rs. 110 in cash and defer the payment of Rs. 110 for 2 years. A agrees to it. If the rate of interest be 10% per annum, in this mode of payment :  
A.  There is no gain or loss to any one [Wrong Answer] 
B.  A gains Rs. 7.34 [Correct Answer] 
C.  A loses Rs. 7.34 [Wrong Answer] 
D.  A gains Rs. 11 [Wrong Answer] 
View Answer

If Rs. 10 be allowed as true discount on a bill of Rs. 110 due at the end of a certain time, then the discount allowed on the same sum due at the end of double the time is :  
A.  Rs. 20 [Wrong Answer] 
B.  Rs. 21.81 [Wrong Answer] 
C.  Rs. 22 [Wrong Answer] 
D.  Rs. 18.33 [Correct Answer] 
View Answer
Explanation:
Answer : D Discuss it below :S.I. on Rs. (110  10) for a certain time = Rs. 10. S.I. on Rs. 100 for double the time = Rs. 20. T.D. on Rs. 120 = Rs. (120  100) = Rs. 20. T.D. on Rs. 110 = Rs. Click here for more comments 
The interest on Rs. 750 for 2 years is the same as the true discount on Rs. 960 due 2 years hence. If the rate of interest is the same in both eases, it is :  
A.  12% [Wrong Answer] 
B.  14% [Correct Answer] 
C.  15% [Wrong Answer] 
D.  16 
View Answer
Explanation:
Answer : B Discuss it below :S.I. on Rs. 750 = T.D. on Rs. 960. This means P.W. of Rs. 960 due 2 years hence is Rs. 750. T.D. = Rs. (960  750) = Rs. 210. Thus, S.I. on Rs. 750 for 2 years is Rs. 210. ∴ Rate = Click here for more comments 
The simple interest and the true disrount on a certain sum for a given time and at a given rate are Rs. 85 and Rs. 80 respectively. The sum is :  
A.  Rs. 1800 [Wrong Answer] 
B.  Rs. 1450 [Wrong Answer] 
C.  Rs. 1360 [Correct Answer] 
D.  Rs. 6800 [Wrong Answer] 
View Answer
Explanation:
Answer : C Discuss it below : ^{(S. I. )  (T. D. )} ^{(85  80)} = Rs. 1360. Click here for more comments 
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