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