Quantitative Aptitude Questions for IBPS/RRB Exam Set – 11

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1. The population of a city is 1500000. It increases by 10% during 1st yr, decreases by 20% in 2nd yr and increases by 30% in the 3rd yr. The population after 3 yr is ?
   A)1756000
   B)1716000
   C)1816000
   D)None
   

   Answer

   B)1716000
   Explanation :
   Total inc/dec=10-20-2=-12
   3^rd year=-12+30-3.6=14.4
   1500000*14.4%=171600
   
   
   
2. A, B and C undertake to complete a piece of work for Rs 1950. A works for 8 days, B for 9 days and C for 12 days to complete the work. If their daily wages are in the ratio of 3 : 5 : 4, what does C get?
   A)400
   B)800
   C)300
   D)600
   

   Answer

   B)800
   Explanation :efficiency of A,B,C=9,8,4respectively
   
   
   
3. A fruit seller buys mangoes at the rate of 15 for 12 and sells them at the rate of 15 per dozen. Find his gain percentage.
   A)54.65%
   B)56.75%
   C)66.5%
   D)56.25%
   

   Answer

   D)56.25%
   Explanation :
   Answer=buys 15mangoes for 12 rs
   Sell them at 12 mangoes for 15rs
   Profit =15/12 – 12/15-9/20
   P%=9/20*15/12*100=56.25%
   
   
   
4. A motorist travels a distance of 10 km at a speed of 50 km/h in the onward journey and 60 km/h while returning. His average speed is
   A)54 (6/11) km/hr
   B)55km/hr
   C)56 (7/11)km/hr
   D)54 (4/11)km/hr
   

   Answer

   A)54 (6/11) km/hr
   Explanation :2*50*60/5+6 = 54(6/11)
   
   
   
5. The difference between compound and simple interst on a certain sum of money in 2 yr at 5% per annum is 12.50. Find the sum.
   A)2000
   B)5000
   C)4000
   D)6000
   

   Answer

    B)5000
   
   
   
6.  A starts a business with Rs 5000. After 4 months, B joins him with a sum of Rs 4000. In the end of the year there is a profit of Rs 8970. The share of A in the profit will be
   A)5850
   B)4540
   C)3420
   D)4580
   

   Answer

   A)5850
   Explanation :Ratio 12*5000:8*4000=15:8
   
   
   
7. A father’s age is four times that of his son. Eight years before, the father’s age was sixteen times that of the son. Father’s age is
   A)30
   B)40
   C)50
   D)60
   

   Answer

   B)40
   
   
   
8. 6.36 + 33.6 + 66.3 + 6.36 =?
   A)102.62
   B)202.62
   C)112.62
   D)204.62
   

   Answer

   Answer – C)112.62
   
   
   
9. What will be the average of the following set of scores?
   24, 47, 63, 98, 52, 14, 87
   A)56
   B)57
   C)54
   D)55
   

   Answer

   D)55
   
   
   
10. The sum of two consecutive numbers is 157. What is their product?
    A)6121
    B)6162
    C)6212
    D)6132
    

    Answer

    B)6162