TNPSC Group I Exam-Previous Year Question Paper-Subject wise Analysed Questions-Mental Ability-Part 4
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94. √248
+ √52 + √144
= ?
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76. Consider the following:
Statements : Some cares are bikes.
No bike is train.
Conclusions : I No
car is train
II No
bike is car
III Some
car are trains
IV Some
bikes are cars.
of the conclusions :
A) I and II are correct
B) IV alone is correct
C) all the
correct
D) I, II and IV are correct
Answer : (B)
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1 1
77. 1.2 2.3 3.4 4.5 + …. =
A) 2log 2-1 B) -2log 2-1
C) 2 log 2+1 D) -2 (log 2+1)
Answer : (C)
78. Three men start waling at the same point,
same time and in the same direction around a circular stadium. First man
completes a round in 120 seconds, second man in 150 seconds and third man in 80
seconds. After what time will they meet again at the starting point?
A) 20 minutes B) 2 min. 20 sec.
C) 2 min. 30
sec. D) 1 min. 40 sec.
Answer : (A)
79. The area if a rectangle is 16sq. meters
and is 4 times that of the breadth. What is the perimeter of the rectangle?
A) 20 m B) 18 m
C) 16 m D) 14 m
Answer : (A)
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80. In the forest, X can cut 10 th
if the trees in 50 days. Y can cut 40% of the
1
trees in 40 days and z can 2
of the trees in 80 days. who will complete the work first?
A) X B) Y
C) Z D) X and Z
Answer : (A)
81. The ratio of the length and breath of a
plot is 4:5. If the length is 20 m less than the breath, what is the perimeter
of the plot?
A) 180 m B) 360 m
C) 80 m D) 100 m
Answer : (B)
2009
82. Consider the following statements:
Assertion (A) : Median of (7,2,12,5,9) is 7.
Reason (R) : The
middle most value of a data is called median.
Now select your answer according to the
coding scheme given below:
A) (A) is true, but (R) is false
B) (A) alone is true
C) (R) alone
is true
D) Both (A)
and (R) are true and (R) is the correct explanation of (A)
Answer : (A)
83. Match List I with List II correctly and
select your answer using the codes given below:
List I List
II
a) Correlation
coefficient 1) Mean = Median = Mode
b) Coefficient of variation 2)
Least
c) For a symmetrical 3) Percentage variation
distribution
d) Mean deviation from 4)
Cannot exceed unity
Median
Codes :
a b c d
A) 4 3 2 1
B) 4 2 3 1
C) 4 3 1 2
D) 3 4 2 1
Answer : (C)
84. Which one of the following is correctly
matched?
A) Harmonic
mean - A measure of skewness
B) Mean
deviation - An average
C) Analysis - An arrangement of data
D) Sales and
Profit - Positive correlation
Answer : (D)
85. Which one of the following is correctly
matched?
A) Data - A collection of objects
B) Mode -
A well defined measure
C) Range - Difference between the largest and the
smallest items of a data
D) Q.D. - A best measure of dispersion
Answer : (C)
86. The average of three numbers is 135. The
largest number is 180 and the difference of the other two is 25. The smallest
number is
A) 130 B) 125
C) 120 D) 100
Answer : (D)
87. By frequency distribution we mean the
classification of data according to
A) dissimilarities B) similarities
C) class
intervals D) magnitude
Answer : (C)
88. Value of M.D. of {5,5,5,5,5} from Median
is
A) 0 B) 2
C) 4 D) 5
Answer : (A)
89. If y = 3 + 2x, then the coefficient of
correlation between x and y is
A) - 1 B) 0
C) 0.5 D) 1
Answer : (D)
90. Which one of the following measures
cannot be computed for {2,7,5,10,4} ?
A) Mean B) Median
C) Mode D) Harmonic Mean
Answer : (C)
91. Consider the following statements:
Assertion (A) : Histogram is a graphical presentation of
data.
Reason (B) :
Statistical data can be represented in the form of graphs
Now select your answer according to the
coding scheme given below:
A) Both (A) and (R) are true
B) Both (A) and (R) are false
C) (A) is
true, but (R) is false
D) (A) is false, but (R) is true
Answer : (A)
92. What least number must be added to 1056
to get a number exactly
divisible by 237
A) 21 B) 25
C) 3 D) 2
Answer : (D)
93. The ratio of two numbers is 13:15 and
their LCM is 39780. The number are
A) 2652, 3060 B) 884,
1020
C) 884, 1040 D) 670, 1340
Answer : (A)
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94. √248
+ √52 + √144
= ?
A) 14 B) 16
C) 18.8 D) 16.6
Answer : (B)
95. The boys
and girls in a college are in the ratio 3:2. If 20% of the boys and 25%
of the girls are adults. the percentage of students who are not adults is
A) 67.5% B) 82.5%
C) 78% D) 58%
Answer : (C)
96. Five years ago the average age of A, B,
C, D was 45 years. By including
X the present average of all the
five is 49 years. Then the present age of
X is
A) 64 years B) 48
years
C) 45 years D) 40 years
Answer : (C)
97. The difference between simple interest
and the compound interest on Rs.800 at 5% per annum for 1 year is
A) Rs. 81 B) Rs. 41
C) Rs. 56.50 D) None of
these
Answer : (D)
98. A boat moves downstream at the rate of
1km in 6 minutes and upstream
at the rate of 1 km in 10 minutes.
The speed of current is
A) 2 km/hr B) 1 km/hr
C) 1.5 km/hr D) 2.5 km /hr
Answer : (A)
99. The ratio of number of boys and girls in
a school of 720 students is 7:5. How many more girls should be admitted to make
the ratio 1:1?
A) 90 B) 220
C) 120 D) 240
Answer : (C)
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100. A can do 3 of a work in 5 days. B can do 5
of the work in 10 days. In how many days both A and B can do the work?
3 3
A) 7 4
days B) 9
8 days
4
C) 8 5 days D) 10
days
Answer : (B)
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