TNPSC Group 1 2024 Preliminary Examination
Aptitude Questions 1 to 25
1.
P, Q, R, S, T and U are six members in a family in which there are two married couples. T a teacher is married to a doctor who is mother of R and U. Q the lawyer is married to P. P has one son and one grand son. Of the two married ladies one is a housewife. There is also one student and one male engineer in the family. Who among the following is the housewife?
Answer:
A.
P
2.
If A = Z = 1, B = Y = 2, C = X = 3,..... etc.
Which one is wrong?
Which one is wrong?
Answer:
D.
E, G, J are prime numbers
3.
A does 20% less work than B. If A can complete a piece of work in \(7\dfrac{1}{2}\) hours then B can do it in
Answer:
A.
\(6\) hours
4.
If 4 men can complete a work in 3 days and 3 women can complete that work in 6 days, then which one of the following is not true?
Answer:
B.
6 men and 8 women can complete the work in one day
5.
The area of circle increased by 66 sq.cm. If its radius is increased by 1 cm. Find the area of new circle.
Answer:
C.
\(\dfrac{2}{7}\times11^3\)
6.
The population of a town is increasing at the rate of 6% per annum. It was 238765 in the year 2018. Find the population of the year 2020.
Answer:
B.
268276
7.
If the Simple Interest on Rs. 20,000 be more than the Simple Interest on Rs. 15,000 by Rs. 3,000 in 5 years, the rate percent p.a. is?
Answer:
C.
12%
8.
If \(\dfrac{6x+2y}{3x+4y}=\dfrac{3}{4}\) and \(\dfrac{x+z}{2x+3z}=\dfrac{3}{7}\) Then find \(x:y:z\)
Answer:
B.
4 : 15 : 2
9.
The LCM of three different numbers is 120. Which of the following cannot be their HCF?
Answer:
D.
35
10.
If \(a=2^2\times3^3\)
\(b=3^2\times5^3\)
\(c=5^2\times2^3\) then find the value of
\(\mathrm{HCF}(a^2,b^3)+\mathrm{HCF}(b^2,c^3)+\mathrm{HCF}(c^2,a^3)\)
\(b=3^2\times5^3\)
\(c=5^2\times2^3\) then find the value of
\(\mathrm{HCF}(a^2,b^3)+\mathrm{HCF}(b^2,c^3)+\mathrm{HCF}(c^2,a^3)\)
Answer:
A.
\(3^6+2^6+5^6\)
11.
During one year, the population of a town increased by 5% and during the next year, the population decreased by 5%. If the total population is 9,975 at the end of the second year, then what was the population size in the beginning of the first year?
Answer:
D.
10,000
12.
What fraction should be added to the sum of \(5\dfrac{3}{4}\), \(4\dfrac{4}{5}\) and \(7\dfrac{3}{8}\) to make the result a whole number?
Answer:
C.
\(\dfrac{3}{40}\)
13.
\(\dfrac{(963+476)^2+(963-476)^2}{963\times963+476\times476}\) = ?
Answer:
C.
2
14.
In an A.P
\(t_{20}+t_{21}+t_{22}+\cdots+t_{30}=0\)
Which one of the following is false?
\(t_{20}+t_{21}+t_{22}+\cdots+t_{30}=0\)
Which one of the following is false?
Answer:
D.
If \(d\) is positive, \(a\) is also positive
15.
In a class of 35 students Kamal is placed seventh from the bottom whereas Suresh is placed ninth from the top. Ramesh is placed exactly in between the two. What is Kamal's position from Ramesh?
Answer:
B.
10
16.
What is the probability of getting a prime number as a sum from two throws of a dice?
Answer:
C.
\(\dfrac{15}{36}\)
17.
The radius of a circle is increased so that its circumference is increased by 5%. Find the percentage of increase in its area.
Answer:
A.
10.25%
18.
The diagonal of a cubic room is \(11\sqrt{3}\) feet. Find the volume of it.
Answer:
D.
\(1331\) cu.feet
19.
Certain type of bacteria grows 5% in first hour and decreases in number by 12% in second hour and grows 10% in third hour. Initially 20000 bacteria were present. Find the number of bacteria after 3 hours.
Answer:
A.
20328
20.
Find the amount to be received after 2 years 6 months at the rate of 5% p.a. of Simple Interest on a sum Rs. 6,400
Answer:
B.
7,200
21.
The maximum speed of the Elephant is 20 km/hr, the Lion is 80 km/hr and the Cheetah is 100 km/hr. Find the ratio of the speed and find which ratio is the least one.
Answer:
C.
The Elephant and the Cheetah
22.
The traffic lights at three different road crossings change after every 48 sec, 72 sec and 108 sec respectively. If they all change simultaneously at 8 : 20 : 00 hours. Then at what time will they again change simultaneously?
Answer:
A.
8:27:12 hrs
23.
Find the greatest number which on dividing 1657 and 2037 leaves remainders 6 and 5 respectively
Answer:
C.
127
24.
The greatest number which can divide 1356, 1868 and 2764 having the same remainder 12 in each case is ____________ ?
Answer:
A.
64
25.
A water heater is sold by a trader for Rs. 10,502 including GST at 18%. Find the GST amount.
Answer:
B.
Rs. 1,602