True Discount

1) The list price of an article is Rs. 20. There is a discount of 5%. What is the selling price?
(A) 16
(B) 19
(C) 21
(D) 24

2) Find the selling price of an article listed at Rs. 10 on which there are discounts of 20% and 10%.
(A) 7.20
(B) 6.20
(C) 10.20
(D) 8.20

3) A single discount equivalent to a discount series of 20%, 10% and 25% is?
(A) 55%
(B) 54%
(C) 46%
(D) 42%

4) A company sells pens at a price of Rs. 100 per dozen, but gives a 15% discount on any order which exceeds 12 dozens. If a merchant wants to get three thousand pens, how much he will have to pay?
(A) Rs. 17425
(B) Rs. 20500
(C) Rs. 21250
(D) Rs. 23500

5) How much percent must be added to the cost price of goods so that a profit of 20% must be made after throwing off a discount of 10% from the labeled price?
(A) 35%
(B) 40%
(C) 30%
(D) 33 1/3%

6) A Rs. 400 coat sells for how much after successive discounts of 10% and 5%?
(A) Rs. 325
(B) Rs. 342
(C) Rs. 240
(D) Rs. 357

7) The present worth of Rs. 2310 due 2 1/2 years hence, the rate of interest being 15% per annum, is:
(A) Rs. 1750
(B) Rs. 1680
(C) Rs. 1840
(D) Rs. 1960

8) 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 cases, it is:
(A) 12%
(B) 13%
(C) 14%
(D) 16%