Quant Test for IBPS PO Prelims Exam set – 18

Directions(1-5): What value will come in place of question mark '?' in the following questions.

1. ? = 15% of 64% of 75% of 6000
   480
   452
   400
   432
   414
   Option D
   ? = 15% of 64% of 75% of 6000
   =>?= 432
   
   
    



2. ?^2 = 8765 – 7685 + 63*15
   30
   26
   40
   51
   45
   Option E
   ?^2 = 8765 – 7685 + 63*15
   =>?^2 = 1080 + 945
   =>?^2 = 2025
   =>? = 45
   
   
    



3. 32^2 – 83% of 900 – 9*11 = ?
   150
   178
   162
   148
   153
   Option B
   32^2 – 83% of 900 – 9*11 = ?
   =>? = 1024 – 747 – 99
   =>? = 178
   
   
    



4. 14% of ? = 9% of 280
   120
   130
   180
   160
   170
   Option C
   14% of ? = 9% of 280
   =>? = 180
   
   
    



5. ?^1/2 = 16*14 – 12*18 + 352 /22
   520
   500
   555
   576
   540
   Option D
   ?^1/2 = 16*14 – 12*18 + 352 /22
   =>?^1/2 = 224 – 216 + 16
   =>?^1/2 = 8+16
   =>?^1/2 = 24
   =>? = 576
   
   
    



6. The average age of 30 students is 16 years. If the age of the teacher is also included then the average age increased by 1 year, find the age of the teacher.
   40
   32
   47
   56
   50
   Option C
   Teacher age is T years. So, 30*16 + T = 31*17
   =>T = 47 years
   
   
    



7. P,Q and R invested Rs. 6000 , Rs.4000 and Rs.8000 in a business. P left a business after 6 months.If after one year there was a gain of Rs.5200.Then what will be the share of P?
   1000
   1200
   1150
   1220
   1040
   Option E
   P Q R
   6000×6 4000×12 8000×12
   3 4 8
   P:Q:R = 3:4:8
   P share = 5200×(3/15) = 1040
   
   
    



8. A 50 litre of mixture contains milk and water in the ratio 2:3. How much milk must be added to the mixture so that it contains milk and water in the proportion of 3:2.
   25
   20
   30
   32
   45
   Option A
   (20 + x)/30 = 3/2
   =>x = 25
   
   
    



9. A boatman goes 2 km against the current of the stream in 1 hour and goes 1 km along the current in 10 minutes. How long will it take to go 5 km in stationary water?
   3.20
   2.27
   1.50
   1.25
   2.20
   Option D
   Downstream =(1x 60)/10 = 6 kmph
   Rate upstream = 2 km/hr.
   Speed in still water =(6 + 2) /2= 4 kmph
   Time = 5/4 = 1.25 hrs.
   
   
    



10. A bag contains 6 red balls and 8 green balls. Two balls are drawn at random one after one with replacement. What is the probability that-
    Both the balls are green
    
    12/47
    13/49
    14/47
    16/49
    10/41
    Option D
    P = (8/14)*(8/14) = 16/49