Dear Readers, Important Aptitude Questions for Railway / SSC CGL,CHSL Exam was given here with solutions, candidates those who are preparing for those exams can use this material.
1).In two
types of stainless steel, the ratio of chromium and steel are 2 : 11 and 5 : 21
respectively. In what proportion should the two types be mixed so that the
ratio of chromium to steel in the mixed type become 7 : 32?
a)
2
: 3
b)
3
: 4
c)
1
: 2
d)
1
: 3
2).A sum of
Rs. 7, 000 is divided among A, B, C in such a way that the shares of A and B
are in the ratio 2 : 3 and those of B and C are in the ratio 4 : 5. The share
of B is
a)
Rs.
2,400
b)
Rs.
3, 0000
c)
Rs.
1, 600
d)
Rs.
2, 000
3).Tea worth
Rs. 126 per kg and Rs. 135 per kg are mixed with a third variety in the ratio 1
: 1 : 2. If the mixture is worth Rs 153 per kg. the price of the third variety
per kg will be
a)
Rs.
175. 5
b)
Rs.
180. 0
c)
Rs.
169. 5
d)
Rs.
170. 0
4).In the
afternoon, a student read 100 pages at the rate of 60 pages per hour, In the
evening. When she was tired, she read 100 more pages at the rate of 40 pages
per hour. What was her average rate of reading, In pages per hour?
a)
60
b)
70
c)
48
d)
50
5).The mean weight
of 34 students of a school is 42 kg. If the weight of the teacher be included,
the mean rises by 400 grams. Find the weight of the teacher (in kg.)
a)
55
b)
57
c)
66
d)
56
6).A
cricketer has a mean score of 60 runs is 10 innings. Find out how many runs are
to be scored in the eleventh innings to raise the mean score to 62?
a)
83
b)
82
c)
80
d)
81
7).A trader
purchases a watch and a wall clock for Rs. 390. He sells them making a profit
of 10% on the watch and 15% on the wall clock. He earns a profit of Rs. 51.50.
The difference between the original prices of the wall clock and the watch is
equal to
a)
Rs.
80
b)
Rs.
120
c)
Rs.
110
d)
Rs.
100
8). The wrong
number in the series:
2, 9, 28, 65, 126, 216, 344 is
a)
65
b)
216
c)
9
d)
None
of these
9).Eight
consecutive numbers are given. If the average of the two numbers that appear in
the middle is 6, then the sum of the eight given numbers is
a)
54
b)
64
c)
36
d)
48
Answers:
1).c ) 2).a ) 3).a ) 4).c ) 5).d
) 6). b) 7).c
) 8). b) 9).d
)
Solution:
1). Chromium
in Stainless Steel
I= 2/13 ;
In II = 5/26
In mixture = 7/39
Required
ratio=1/78:1/39=1:2
Answer:
c )
2). A : B = 2
: 3 = 8 : 12
B : C = 4 : 5 = 12 : 15
A : B : C = 8 : 12 : 15
Share
of B = 12/(8+12+15) × 7000
= 12/35 × 7000
= Rs. 2400
Answer:
a)
3). Let the
price third tea be Rs. x
Then (126+135+2x)/4= 153
261 + 2x = 4 × 153
= 612
2x
= 612 – 261 = 351
x = 351/2 = Rs. 175.5
Answer:
a )
4). Total
time taken = 100/60 + 100/40 = 5/3 + 5/2 = 25/6
Total
pages = 200
Average
time = 200/(25/6) = (6×200)/25 = 48 pages per
Answer:
c)
5). Total
weight of 34 students
= 34 × 42 = 1428
Total
weight of 34 students and teacher
= 35 × 42.4 = 1484
Weight
of teacher = 1484 – 1428
= 56 kg
Answer:
d)
6). Let the
required runs in 11th innings be x
Then
(60×10×x)/11 = 62
600 + x = 62 × 11 = 682
x = 682 -600
= 82
Answer:
b )
7).
Let cost price of the watch be Rs. X
Then cost price of the wall clock =
390 – x
Then profit = Selling price – Cost
price
= {(110x/100 + [115(390 – x)] / 100)
}– 390 = 51.5
= (44850 – 5x) /100 = 51.5
= 5850 – 5x = 5150
5x = 700
X = 700 /5 = 140
Cost of watch = x = Rs. 140
Cost of wall clock = 390 – x
= 390 – 140 = 250
Difference = 250 = 140 = Rs. 110
Answer:
c )
8).
13+1
= 1 + 1 = 2
23+1 = 8 + 1
= 9
33 +1 = 27 +
1 = 28
43+1 = 64 + 1 = 65
53+1 = 125 +
1 = 126
63+1 = 216 +
1 = 217 ≠ 216
73+1 = 343 +
1 = 344
Wrong number = 216
Answer:
b )
9).
Let
the 8 consecutive numbers be
x,
x+1+, x+2, x+3. x+4, x+5, x+6, x+7
Middle
two number’s average
={(x+3) + (x+4)}/2 = 6
2x+7 = 12
Sum
of eight digits = 8x + 28
= 4(2x+7)
= 4×12 = 48
Answer:
d )
