Quantitative Aptitude: Number Series Set 90

Directions(1-10): What will be the approximate value of “?” in the following questions.

  1. (500.01% of 24.89) / 24.98 = (?)^1/2 – (63.99)^1/2
    144
    169
    181
    175
    190
    Option B
    (500.01% of 24.89) / 24.98 = (?)^1/2 – (63.99)^1/2
    => (?)^1/2 – (64)^1/2 = (500% * 25) / 25
    => (?)^1/2 – 8 = 125 / 25
    =>(?)^1/2 = 8 + 5
    => ? = 169

     

  2. (990 / 18 * 55 + 45^2 – 240% of 62.5) = ?^2
    80
    60
    90
    50
    70
    Option E
    (990 / 18 * 55 + 45^2 – 240% of 62.5) = ?^2
    =>?^2 = 55 * 55 + 2025 – 62.5% * 240
    => ?^2 = 3025 + 2025 – (5/8) * 240
    => ?^2 = 5050 – 150
    => ? = 70

     

  3. ?% of 599.99 = 40.01% of 499.99 + 199.98% of 49.99
    36
    45
    30
    50
    44
    Option D
    ?% of 599.99 = 40.01% of 499.99 + 199.98% of 49.99
    => ?% of 600 = 40% * 500 + 200% * 50
    => ? * 6 = 200 + 100
    => ? * 6 = 300
    => ? = 50

     

  4. 40% of 840 – 18^2 = (?)^1/2 – (216)^1/3
    313
    350
    333
    300
    324
    Option E
    40% of 840 – 18^2 = (?)^1/2 – (216)^1/3
    =>(?)^1/2 – 6 = 0.4 * 840 – 324
    => (?)^1/2 = 336 – 324 + 6
    => (?)^1/2 = 18
    => ? = 324

     

  5. [(196)^1/2 + 432 / 12]% of 720 = ?% of 900
    50
    40
    20
    10
    30
    Option B
    [(196)^1/2 + 432 / 12]% of 720 = ?% of 900
    => ?% * 900 = (14 + 36)% * 720
    => ? * 9 = 50% * 720
    => ? = 40

     

  6. (750 / 15)* 15 + 15^2 + 20% of 125 = ?^3
    13
    10
    15
    18
    16
    Option B
    (750 / 15)* 15 + 15^2 + 20% of 125 = ?^3
    => ?^3 = 750 + 225 + 25
    => ?^3 = 1000
    => ? = 10

     

  7. [(256)^1/2 + (1024)^1/2] / 4 = ?% of 150
    5
    7
    8
    6
    9
    Option C
    [(256)^1/2 + (1024)^1/2] / 4 = ?% of 150
    => ? * 1.5 = (16 + 32) / 4
    => ? * 1.5 = 48 / 4
    => ? = 8

     

  8. 44.98% of 399.98 = ? * 19.98 – (39.98% of 2499.98)
    50
    48
    59
    32
    40
    Option C
    44.98% of 399.98 = ? * 19.98 – (39.98% of 2499.98)
    => ? * 20 – (40% * 2500) = 45% * 400
    => ? * 20 – (40 * 25) = 45 * 4
    => ? * 20 – 1000 = 180
    => ? = 59

     

  9. 35% of 840 + 16^2 = ?^2 – 25% * 300
    20
    15
    18
    25
    12
    Option D
    35% of 840 + 16^2 = ?^2 – 25% * 300
    => ?^2 – 75 = 0.35 * 840 +256
    => ?^2 = 294 + 256 + 75
    => ? = 25

     

  10. [(529)^1/2 + (6^3 / 18)]% of 800 = ?% of 224
    125
    120
    117
    111
    100
    Option A
    [(529)^1/2 + (6^3 / 18)]% of 800 = ?% of 224
    => ?% * 224 = {23 + (216 / 18)}% * 800
    => ? * 224 = 35 * 800
    => ? = (35 * 800)/ 224
    => ? = 125

     


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