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Question: Alok borrows some money from the bank and the SI on the sum is  19th  the principal amount and the number of years is the rate of interest. Find r?
Options:
A.5.55%
B.2.33%
C.3.33%
D.None of these
E.Rs. 221970
Answer: Option C
: C

Answer = Option c Principal = P Time = x Rate = x SI=P9 SI=PRT100P9=Px2100 x2=1009x=103=3.33%

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Question 1. A nano car is bought in 2012 for Rs.17576, if it’s value appreciates annually by  4%, what was its value three years ago?
  1.    13456
  2.    15625
  3.    14565
  4.    none of these
  5.    Rs. 221970
Answer: Option B
: B

Price three years ago X×(104100)3= present price Price 3 years ago = X = 17576(1.04)3 Price 3 years ago= X = 17576×25×25×2526×26×26= Rs15625 . Option (2).
Question 2. Ravi bought a bike with a marked price of Rs.40,000. The dealer gave him two successive discounts of  10%  and  20% . After he bought the bike, he spent    

 10%  of the cost of the bike on the accessories. At what price should he sell the bike to earn a profit of  10%. 
  1.    Rs. 27000
  2.    Rs. 38016
  3.    Rs. 37680
  4.    Rs. 34848
  5.    Rs. 35680
Answer: Option D
: D

Cost of the bike = 0.9×0.8×40000 = Rs. 28800 For Ravi total cost =28800+(28800×0.1)=31680 So, for a profit of 10% he should sell the bike at 31680+(0.1×31680)=Rs.34848 Hence option (d)
Question 3. The length of a rectangle is increased by a=30%  and breadth is decreased by b=25%  . What is the percentage change in the area of the rectangle?
  1.    2.5%  increase
  2.    2.5%  decrease
  3.    5%  increase
  4.     None of these
Answer: Option B
: B

Answer = option b Initial area =l×b Final area =1.3l×0.75b =0.975l×b % change =(10.975)×100=2.5% decrease
Question 4. A trader makes a profit equal to the selling price of 50 articles when he sold 80 of the articles. What  %  profit did he make in the transaction?
  1.    183%
  2.    176%
  3.    183.33%
  4.    166.67%
  5.    6500
Answer: Option D
: D

Soln:Let S be the selling price of 1 article.Therefore, the selling price of 80 articles = 80 S The profit earned by selling these 80 articles = selling price of 50 articles = 50 S We know that Selling Price (S.P.) = Cost Price (C.P) + Profit ofSelling price of 80 articles = 80 S and Profit = 50 S 80 S = C.P + 50 S. Hence, C.P = 80 S - 50 S = 30 S.Profit %=(50S30S)×100=166.67%
Question 5. Ram adjusted his electronic weighing scale in a typical way. But he gives a discount of 10% in every transaction. His weighting scale shows 5 kg for 4 kg. What is the actual profit % when the displayed weight is 10 kg, if he sells the commodity at its cost price?
  1.    12.5%
  2.    10%
  3.    5%
  4.    25%
  5.    40%
Answer: Option A
: A

5kg ---> 4kg
10kg ---> 8kg
C.P of product of 1 kg = x
Total C.P = 8x
S. P = 10x - x(10% discount of 10x)
= 9x
Profit % = x8x×100
= 12.5%
Question 6. At a new book-store, the inaugural discount is as follows. If the value of purchase  < 3200, the buyer gets a 14% discount. If the purchase  3200<x<6300 , then the buyer gets a 16% discount. Above 6300, the discount percentage is x. A certain buyer gets a total discount of Rs. 1520 which is 16% of the purchase value. What is x?
  1.    15%
  2.    16%
  3.    18%
  4.    20%
Answer: Option C
: C

16% of purchase value = Rs. 1520 purchase value = 9500 1520=14%of3200+16%of3100+x%of3200 1520=944+x%of3200 576=x%of3200 x=18%

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