Mixed Quantitative Aptitude Questions Set 133

1. Work done by A in one day is four times the work done by B in one day, while the work done by B in one
   day is one-third of the work done by C in one day. C alone can complete the work in 16 days. In how
   many days can all the three together complete the work?
   5
   3
   8
   6
   4
   Option D
   C = 16 days
   B = 3(16)= 48 days
   A = 48/4 = 12 days
   All of them = 1/[1/16+1/48+1/12] = 6 days
   
   
    



2. A and B started a business with initial investments in the ratio 5 : 7. If after one year their profits were in the ratio 1 : 2 and the period for A’s investment was 7 months, B invested the money for?
   
   12
   10
   13
   16
   11`
   Option B
   Let initial investments be 5x and 7x.
   Let B invested money for months y months
   (5x+7)/(7x*y) = ½
   =>y = 10 months
   
   
    



3. A tap can empty a tank in one hour. A second tap can empty it in 30 min. If both the taps operate simultaneously, how much time is needed to empty the tank?
   
   40
   30
   20
   50
   60
   Option C
   Required time = 1/[1/60+1/30] = 20 min.
   
    



4. Suhas decided to donate 15% of his salary. On the day of donation he changed his mind and donated Rs.1,650 which was 11/15th of what he had decided to donate earlier. How much is Suhas' salary?
   
   1100
   1500
   1000
   1400
   1600
   Option B
   11/15*15/100*x = 1650
   =>x = Rs.1500
   
   
    



5. Three numbers are A,B and C are in the ratio 1:2:3 and their average is 600.if A is increases by 10% and B is decrease by 20%,then the average increased by 5%, C will be increase by ?
   
   9
   10
   16
   13
   12
   Option A
   sum of A, B and C = 600 × 3 = 1800
   A = 300, B = 600, C = 900
   Now A = 330, B = 480
   Average = 630
   630 × 3 = 330 + 480 + C
   C = 1080
   C will be increased by 180
   7802 + 132 − 8963 + 1326 =?×33
   =>9260 – 8963 = ? × 33
   =>? = 297/33 = 9
   
   
    
Directions(6-10): What approximate value will come in place of question mark '?' in the following questions.


6. 21.9% of 650 = ? + 23.12
   100
   115
   119
   120
   125
   Option C
   21.9% of 650 = ? + 23.12
   =>142.35 = ? + 23.12
   =>? = 119.23 == 119
   
   
    



7. 14.5% of 740 – ?% of 320 = 87.3
   7
   8
   9
   6
   4
   Option D
   14.5% of 740 – ?% of 320 = 87.3
   107.3 – 87.3 = ?/ 100 ×320
   =>? = 20×100/320 = 6.25 == 6
   
   
    



8. 7802 + 132 − 8963 + 1326 =?×33
   14
   11
   13
   9
   10
   Option D
   7802 + 132 − 8963 + 1326 =?×33
   =>9260 – 8963 = ? × 33
   =>? = 297/33 = 9
   
   
    



9. 85% of 420 + ?% of 1080 = 735
   31
   20
   44
   39
   35
   Option E
   85% of 420 + ?% of 1080 = 735
   =>85/ 100 ×420 + 𝑥/100 ×1080 = 735
   => x = 35
   
   
    



10. 30% of 1225 – 64% of 555 = ?
    15
    16
    14
    12
    13
    Option D
    30% of 1225 – 64% of 555 = ?
    =>? = 367.5 – 355.2 = 12.3 ==12