Mixed Quantitative Aptitude Questions Set 143

Directions(1-5): What approximate value will come in place of question mark ‘?’ in the following questions:

  1. 1701 ÷ 2100 + 3087 ÷ 6300 + 832 ÷ 5200 =?
    1.11
    1.25
    2.23
    1.46
    2.05
    Option D
    1701 ÷ 2100 + 3087 ÷ 6300 + 832 ÷ 5200 =?
    ? = 0.81 + 0.49 + 0.16 = 1.46

     

  2. 39% of 450 + 51% of 340 – 40% of 255 =?
    112.5
    230.6
    246.9
    201.8
    250.7
    Option C
    39% of 450 + 51% of 340 – 40% of 255 =?
    ? = 39/100 × 450 + 51/100 × 340 – 40/100 × 255
    = 246.9

     

  3. 17 × 25 – 240 +? ÷ 41 = 354
    4540
    5646
    5060
    6929
    6000
    Option D
    17 × 25 – 240 +? ÷ 41 = 354
    ? /41 = 354 – 425 + 240
    ⇒ ? = 41 × 169
    ⇒ ? = 6929

     

  4. 3.4 × 2.6 × 5.4 ÷ 1.8 ÷ 0.17 =? ÷ 0.8
    120.6
    100.7
    121.6
    130.8
    124.8
    Option E
    3.4 × 2.6 × 5.4 ÷ 1.8 ÷ 0.17 =? ÷ 0.8
    ? /0.8 = 156
    ⇒ ? = 124.8

     

  5. ? ÷ 13 + 2262 ÷ 39 × 243 + 273 ÷ 3 = 5 × (1481 + 1376)
    1500
    1600
    1200
    1300
    1100
    Option D
    ? ÷ 13 + 2262 ÷ 39 × 243 + 273 ÷ 3 = 5 × (1481 + 1376)
    ? /13 + 14094 + 91 = 14,285
    ⇒ ?/13 = 100
    ⇒ ? = 1300

     

  6. A milkman has 20 L of pure milk. He sells 5 L of it at profit of 20% and he mixes 5 L water in remaining quantity of milk. If he sells whole quantity of mixture at cost price, then find his percentage profit?
    36%
    20%
    30%
    15%
    10%
    Option C
    Let 1 L of milk cost = Rs.10
    So, in selling 5 L of milk he get = 1 5 × 5 × 10 Profit
    If he professes to sell mixture at cost price then his profit = 5 × 10 Rs.
    Overall percentage profit = (50+10)/( 20×10) × 100 = 30%

     

  7. The sum of the radius and height of a cylinder is 18m. The total surface area of the cylinder is 792 m², what is the volume of the cylinder ? (in m³)
    1302
    1552
    1694
    1660
    1545
    Option C
    Given, h + r = 18 m
    According to question,
    2πr (h + r) = 792
    2 × 22/7 × r × 18 = 792
    r = 7m
    And h= 11m
    Volume of the cylinder = πr²h = 22/7 × 7 × 7 × 11 = 22 × 77 = 1694 m³

     

  8. In a 90 litre mixture of milk and water, percentage of water is only 30%. The milkman gave 18 litres of this mixture to a customer and then added 18 litres of water to the remaining mixture. What is the percentage of milk in the final mixture ?
    71%
    62%
    49%
    56%
    60%
    Option D
    Initial water = 30 100 × 90 = 27 L
    And, milk = 90 – 27 = 63 L
    Required percentage = [70/100 × (90 – 18)]/90 × 100 = 56%

     

  9. If the area of a circle is 616 𝐜𝐦^𝟐 , what would be the total surface area of a hemisphere having the same radius as the circle ?
    1556
    1848
    1990
    1676
    1562
    Option B
    Radius of circle = √ 616×7/22 = 14 cm
    Total surface area of hemisphere = 3πr 2 = 3 × 22/7 × 14 × 14 = 1848 cm^2

     

  10. There are two mixtures of honey and water, the quantity of honey in them being 40% and 75% of the mixture respectively. If 5 gallons of the first are mixed with 8 gallons of the second, what will be the ratio of honey to water in the new mixture ?
    8:9
    3:7
    8:5
    1:2
    3:4
    Option C
    Required ratio = [40/100 × 5 + 75/100 × 8]/[60/ 100 × 5 + 25/100 × 8]
    = [2 + 6]/[3 + 2] = 8: 5

     


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