Word Problems for Quantitative Aptitude Section of BANK PO/SSC/Other Exams

1.    The difference between a two digit number.and the number obtained by interchanging the two digits of the number is 9. What is the difference between the two digits of the number?
    (1)    3  
    (2)    2
    (3)    1
    (4)    Cannot be determined
    (5)    None of these
Ans. (3)
2.    In a class there are 32 boys and 28 girls. The average age of the boys in the class is 14 years and the average age of the girls in the class is 13 years. What is the average age of the whole class ? (Rounded off to two digits after decimal)
    (1)    13.50  
    (2)    13.53
    (3)    12.51 
    (4)    13.42
    (5)    None of these
Ans. (3)   
3.     In a test consisting of 80 questions carrying one mark each, Arpita answers 65% of the first 40 questions correctly. What percent of the other 40 questions does she need to answer correctly to score 75% on the entire test?
    (1)    60  
    (2)    80
    (3)    75  
    (4)    40
    (5)    None of these
Ans. (5)   
4.    Manisha invests an amount of Rs. 39,300/- for 4 years at the rate of 4 p. c. p. a. What amount of approximate compound interest will she obtain at the end of 4 years ?
    (1)    Rs. 6,675/-
    (2)    Rs. 6,650/-
    (3)    Rs. 6,288/-
    (4)    Rs. 6,356/-
    (5)    Rs, 6,450/-
Ans. (1)   
5.    The average marks of 65 students in a class was calculated as 150. It was later realised that the marks of one of  the students was calculated as 142, whereas his actual marks were 152. What is the actual average marks of the group of 65 students? (Rounded off to two digits after decImal)
    (1)    151.25  
    (2)    150.15
    (3)    151.10  
    (4)    150.19
    (5)    None of these
Ans. (2)