Mixed Quantitative Aptitude Questions Set 99

Directions(1-5): Find the wrong number of the following series.

  1. 29, 37, 21, 43, 13, 53
    21
    37
    53
    43
    29
    Option D
    29 + 1 × 8 = 37
    37 – 2 × 8 = 37 – 16 = 21
    21 + 3 × 8 = 21 + 24 = 45
    45 – 4 × 8 = 45 – 32 = 13
    13 + 5 × 8 = 13 + 40 = 53

     

  2. 10, 8, 13, 35, 135, 671
    8
    671
    13
    35
    10
    Option B
    10 × 1 – 2 = 8
    8 × 2 – 3 = 13
    13 × 3 – 4 = 35
    35 × 4 – 5 = 135
    135 × 5 – 6 = 675 – 6 = 669

     

  3. 150, 290, 560, 1120, 2140
    1120
    2140
    290
    150
    560
    Option A
    150 × 2 – 1 × 10 = 300 – 10 = 290
    290 × 2 – 2 × 10 = 580 – 20 = 560
    560 × 2 – 3 × 10 = 1120 – 30 = 1090
    1090 × 2 – 4 × 10 = 2180 – 40 = 2140

     

  4. 1, 5, 13, 31, 61, 125
    13
    5
    61
    125
    31
    Option E
    1 + 2^2 = 1 + 4 = 5
    5 + 2^3 = 5 + 8 = 13
    13 + 2^4 = 13 + 16 = 29
    29 + 2^5 = 29 + 32 = 61
    61 + 2^6 = 61 + 64 = 125

     

  5. 8, 11, 17, 47, 128, 371
    8
    17
    128
    47
    371
    Option B
    8 + 3 = 11
    11 + 3^2 = 11 + 9 = 20
    20 + 3^3 = 20 + 27 = 47
    47 + 3^4 = 47 + 81 = 128
    128 + 3^5 = 128 + 243 = 371

     

  6. Directions(6-10): Study the following graphs carefully to answer the qons that follow.
    Number of employees (in hundred) of three categories in 5 factories

    Percentage of females in each group

  7. By what percent the boys in C3 post in factories T3 and T4 together are more or less than the girls on C2 post in factories T1 and T2 together ?
    35%
    47%
    38%
    40%
    42%
    Option B
    Boys in C3 post = 64/100*2250+30/100*1700 = 1950
    Girls in C2 post = 64/100*1350+30/100*1550 = 13290
    Required% = 621/1329*100 == 47%

     

  8. Find the ratio of total girl in C3 in factories T3 and T4 together and girl C1 in factory T2.
    2:3
    3:5
    4:1
    2:7
    5:9
    Option C
    Required ratio = [36/100*2250 + 70/100*1700]/[40/100*1250] = 4:1

     

  9. The girls in Manager post in company T3 can finish a certain piece of work in 20 days. After they began to work, 20 girls left the work after every 5 days. Find the number of days required to complete the work.
    21(13/19) days
    23(11/17) days
    21(12/15) days
    21(13/17) days
    19(10/17) days
    Option D
    No. of girls = 56/100*750 = 420
    420*20 = 420*5 + 400*5 + 380*5 + 360*5 + 340*x
    => 340 + x = 600
    => x = 1(13/17)
    Required days = 5+5+5+5+1(13/17)
    = 21(13/17) days

     

  10. Find the average number of boys in C1 post in all factories together .
    300
    454
    400
    350
    520
    Option C
    Required average = ½[30/100*950 + 60/100*1250+44/100*750+20/100*1050+50/100*850] = 1/5*2000
    = 400

     

  11. The average age of boy in C3 in factory T4 is 74 years. Two-fifth of them have average age of 76 years, 50% of remaining have average age 4 years less that of all boy designers. Find the average age of remaining boy designers.
    71 year 2 months
    84 year 3 months
    66 year 4 months
    77 year 5 months
    75 year 4 months
    Option E
    Number of boy in C3 = 30/100*1700 = 510
    510*74 = 204*76 + 153*70 + 153*x
    => x = 75 year 4 months

     


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