# Quant Test for IBPS Clerk 2018 Prelim Exam Set – 28

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

1. 4,2,2,4,20,?
152
160
145
162
170
Option E
4*1-2 = 2
2*3-4 = 2
2*5-6 = 4
4*7-8 = 20
20*9-10= 170

2. 200,50,400,100,800,?
500
200
600
400
300
Option B
200/4 = 50
50*8 =400
200/4 =100
100*8 =800
800/4 =200

3. 85,68,102,51,?,34
109
110
119
112
111
Option C
85 – 17*1 = 68
68 – 17*2 = 102
102 – 17*3 = 51
51 – 17*4 = 119
119 – 17*5 = 34

4. 76,77,85,94,158,?
170
183
165
184
177
Option B
+1^3
+2^3
+3^3
+4^3
+5^3
? = 183

5. 3,6,15,28,66,?
91
88
95
80
84
Option A
(2^2+2)/2 = 3
(3^2+3)/2= 6
(5^2+5)/2 = 15
(7^2+7)/2 = 28
(11^2+11)/2 = 66
(13^2+13)/2 = 91

6. The overall time taken by a man to cover 36 km downstream and 18 km upstream in 5 hours, while the man takes the same time to cover 54 km downstream and 12 km upstream. Calculate the speed of the stream.
4
5
3
6
8
Option D
36/u + 18/v = 5 —- (1)
54/u + 12/v = 5 —- (2)
On solving (1) and (2) we get
Speed of the stream = (18-6)/2 = 6 km/hr.

7. A shopkeeper sells 3 pens at the cost of 4 pens. If the cost price of each pen is Rs. 6, find the profit% gained by the shopkeeper on each pen.
20%
25%
15%
33.33%
30%
Option D
CP of 4 pens = 6*4 = Rs. 24
SP of 3 pens = Rs. 24
SP of 1 pen = 24/3 = Rs. 8
Profit% = (8-6)/6*100 = 33.33%

8. The ratio of milk to water in the mixture of 35 litres is 5:2 resp. If 14 litres of mixture is removed and 9 litres of milk is added to the mixture then find the ratio of milk to water in the mixture?
4:7
4:1
11:6
9:5
7:3
Option B
Quantity of milk in the mixture = 5/7*35 = 25 L
Quantity of water in the mixture = 35 – 25 = 10 L
After 14 L of mixtures is removed.
Quantity of milk in the mixture = 25 – 5/7*14 = 15 L
Quantity of water in the mixture = 10 – 2/7*14 = 6 L
Total quantity of milk in the mixture after addition of 9 L
of mixture = 15+ 9 = 24 L
Ratio of milk and water = 24:6 =4:1

9. What is the cost of painting the entire surface area of a solid hemisphere dome of radius 14 m at the rate of Rs. 12 per metre square?
Rs. 22110
Rs. 20550
Rs. 22176
Rs. 21025
Rs. 22000
Option C
TSA = 2*22/7*14*14 = 1848 m^2
Total cost of painting = 1848 * 12 = Rs. 22176

10. The number of ways of selecting 1 ball from a bag containing x number of distinct balls is 5 less than the number of ways of selecting 2 balls from the same bag. Find the value of x.
5
4
7
6
8
Option A
Let the number of balls in the bag be x.
xC1 + 5 = xC2
=> x = 5