Quant Test for IBPS Clerk 2018 Prelim Exam Set – 20

Directions(1-5): Find the odd number from the following series.

1. 82,65,84,61,88,59
   84
   65
   82
   88
   59
   Option D
   -17
   +19
   -23
   +29
   -31
   90 should be in place of 88.

    

2. 31,35,51,87,150,251
   51
   35
   150
   31
   251
   Option C
   +4*1^2
   +4*2^2
   +4*3^2
   +4*4^2
   +4*5^2
   151 should be in place of 150.

    

3. 78,86,71,100,60,108
   60
   100
   108
   78
   71
   Option B
   +4*2
   -5*3
   +6*4
   -7*5
   +8*6
   95 should be in place of 100.

    

4. 22,12,14,24,52,138
   22
   14
   12
   24
   138
   Option E
   *0.5+1
   *1+2
   *1.5+3
   *2+4
   *2.5+5
   135 should be in place of 138.

    

5. 14,14,21,42,110,315
   110
   42
   14
   315
   21
   Option A
   *1
   *1.5
   *2
   *2.5
   *3
   105 should be in place of 110.

    

6. The average age of a family of five members is 3 years. The age of the youngest member is x years. Find the value of x if the average age of family excluding the youngest member at the time of the birth of youngest member was 30 years.
   8
   7
   5
   6
   9
   Option E
   Total age of the family =5*33 = 165 years
   Therefore, (165-5x) = 30*4
   => x = 9 years

    

7. A boat can cover 425 kms while travelling downstream in 17 hours. If the ratio of the boat to the speed of the stream is 4:1, resp. Then what is the speed of the boat ?
   30
   10
   20
   40
   50
   Option C
   Let speed of the stream be x km/hr.
   Speed of the boat be 4x km/hr.
   425/(4x+x) = 17
   => x= 5
   Speed of the boat = 4x = 20 km/hr.

    

8. The expenditure of cleaning a rectangular ground is Rs. 1200 at the rate of 30 paisa per m^2 . The length of the ground is 80 m. If the breadth of the ground is increased by 20 m, then find the expenditure of cleaning the ground at the same rate.
   Rs. 1680
   Rs. 1000
   Rs. 1260
   Rs. 1600
   Rs. 1080
   Option A
   Area of the ground = 1200/30*100 = 4000 m^2
   L*B = 4000
   => B = 4000/80 = 50 m
   New Area = (50+20)*80 = 5600 m^2
   Required expenditure = 5600*30/100 = Rs. 1680

    

9. The ratio of age of Sita “x” years before and age of Rita “x” years hence is 8/15. Sita is 5 years younger than Rita and Rita is 2 years older than Geeta who will be 42 years old after 7 years. Find the value of x.
   10
   8
   11
   12
   13
   Option B
   S-x/R+x = 8:15
   Age of Geeta = 42-7 = 35 years
   Age of Rita = 35+2 = 37 years
   Age of Sita = 37-5 = 32 years
   Now, (S-x): (R+x) = 8:15
   => (32-x): (37+x) =8:15 => x = 8

    

10. A bag contains 8 red balls and 7 blue balls. If “p” green balls are added to it, then probability of choosing a blue ball decreases by 2/15. What is the value of p?
    8
    7
    5
    6
    9
    Option D
    Probability of choosing a blue ball = 7/(7+8)
    = 7/15
    Probability of choosing a blue ball after adding p number of green balls = 7/15 -2/15
    = 5/15 = 1/3
    Now, 7/(7+8+p) = 1/3
    => p = 6