# 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