Mixed Quantitative Aptitude Questions Set 164

Directions(1-10): Find the approximate value of the following questions.

  1. 52.012% of 749.75 + 22.05 * ? = 874.07
    15
    10
    25
    22
    27
    Option D
    52.012% of 749.75 + 22.05 * ? = 874.07
    =>52% of 750 + 22*? = 874
    => 390 + 22*? = 874
    =>? = 22

     

  2. 38.78^2 – 77.73*8.99 – 25.08*12.04 = ?
    400
    500
    200
    300
    100
    Option B
    38.78^2 – 77.73*8.99 – 25.08*12.04 = ?
    =>40^2 – 80*10 – 25*12 = ?
    =>1600 – 800 – 300 =?
    =>? = 500

     

  3. 24.05*11.86 – 416.05/16.98 – 108.56 = ?
    140
    152
    120
    133
    148
    Option B
    24.05*11.86 – 416.05/16.98 – 108.56 = ?
    => 24*12 – 416/16 – 110 = ?
    =>288 – 26 – 110 = ?
    =>? = 152

     

  4. 22.25% of 29.69% of 48.12% of 4260 = 50.08% of ?
    220
    245
    261
    258
    240
    Option D
    22.25% of 29.69% of 48.12% of 4260 = 50.08% of ?
    =>20% of 30% of 50% of 4300=50% of ?
    =>? = 258

     

  5. (3100/124)*(8^3 /32) = ?^2
    10
    30
    40
    20
    50
    Option D
    (3100/124)*(8^3 /32) = ?^2
    =>?^2 = 25*(512/32)
    =>?^2 = 25*16
    =>? = 20

     

  6. At what rate of interest an amount of Rs.16000 will become Rs.25000 in 2 years if the rate is compounded annually.
    27%
    22%
    25%
    15%
    20%
    Option C
    25000 = 16000{1+r/100}^2
    r = 25%

     

  7. Five years ago, Rahul was 20 years elder than Raj. After 15 years, the ratio of their ages is 2:3. Find the average of their present ages.
    32 years
    25 years
    20 years
    30 years
    35 years
    Option E
    Let the present ages of Rahul and Raj be x and y resp.
    x = y +20 —-(1)
    And (y+15)/(x+15) = 2/3 —-(2)
    On solving both the equations, we get
    x = 45 years
    y = 25 years
    Average = 70/2 = 35 years

     

  8. A shopkeeper marked his goods 60% above cost price and gave a discount of 25%. Find the profit percentage of shopkeeper.
    30%
    25%
    20%
    15%
    10%
    Option C
    Profit% = {(120-100)/100}*100 = 20%

     

  9. A boat can cover 36 km upstream in 6 hours, and 84 km downstream in 7 hours. Find the ratio of speed of boat in still water to speed of stream.
    3:4
    2:5
    3:1
    4:1
    3:2
    Option C
    Required ratio =(12+6)/2 : (12-6)/2
    = 3:1

     

  10. A 260 ml mixture contains water and acid in the ratio 6:7 resp. How much acid should be added to the mixture so that the ratio of water and acid changes to 3:5 resp.
    30 ml
    60 ml
    20 ml
    50 ml
    40 ml
    Option B
    Quantity of water = 120 ml
    Quantity of acid = 140 ml
    Now,
    120/(140+x) = 3/5
    => x= 60 ml

     


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