Mixed Quantitative Aptitude Questions Set 137

Directions(1-5): Find the missing term ‘?’ of the following series.

  1. 17,18,35,?,88,141
    70
    78
    81
    88
    92
    Option D
    17+18
    18+35
    53+35
    88+53
    ? = 88

     

  2. 300,280,252,216,172,?
    110
    130
    140
    120
    150
    Option D
    -4*5
    -4*7
    -4*9
    -4*11
    -4*13
    ? = 120

     

  3. 19,20,42,129,?,2605
    500
    450
    447
    520
    546
    Option D
    *1+1
    *2+2
    *3+3
    *4+4
    *5+5
    ? = 520

     

  4. 17,38,80,143,227,?
    345
    300
    332
    318
    325
    Option C
    +21*1
    +21*2
    +21*3
    +21*4
    +21*5
    ? = 332

     

  5. 363,353,333,303,?,213
    263
    225
    250
    263
    245
    Option A
    -10,-20,-30,-40,-50
    ? = 263

     

  6. When 50% of first number is added to the second number then second number increases by 25% . Find the ratio of first number to the second number.
    3:5
    5:7
    1:2
    2:5
    1:4
    Option C
    Let the first number be x and second number be y resp.
    50% of x + y = 1.25y
    =>x : y = 1:2

     

  7. A mixture of contains 360 litres of milk and water in the ratio of 5:4 resp. x litres of mixture is taken out and replaced with same quality of water such that of milk and water becomes 1:1 resp.Find the value of x.
    30
    44
    36
    28
    39
    Option C
    Quantity of milk = 5/9*360 = 200 L
    Quantity of water = 4/9*360 = 160 L
    200 – (5x/9) = 160 – (4x/9)+ x
    => x = 36 L

     

  8. A,B and C started a business together with a total investment of Rs.3600. After a year , A and B received a profit of Rs.1500 and Rs.2000 out of the total profit of Rs.6000. Find the inital investment of C (in Rs.)
    1000
    1500
    1400
    1300
    1200
    Option B
    Ratio of investment of A:B:C = 1500:2000:(6000-1500-2000)
    = 3:4:5
    Initial investment of C = 5/(3+4+5)*3600 = Rs.1500

     

  9. The ratio of the units digit to the tens digit of two digit number is 4:1 and the sum of digits is 10. Find the product of digits of number.
    10
    14
    16
    19
    13
    Option C
    Unit’s digit be 4x and ten’s digit be x resp.
    4x+x = 10
    x = 2
    Required number = 28
    Product of digits = 2*8 = 16

     

  10. A bag contains (x+2) red balls, (x+3) green balls and (x+4) yellow balls. If the probability of drawing a red ball from the bag is 3/10. Find the number of green balls in the bag.
    13
    18
    10
    12
    14
    Option C
    Total number of balls in the bag = 3x+9
    Probability of drawing a re ball = 3/10
    (x+2)/(3x+9) = 3/10
    =>x = 7
    Total number of green balls = 7+3 = 10

     


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