RRB NTPC 2017 PYQs

Question 1

Evaluate:sin‌30°cos‌45°×sin‌45°cos‌30°

Accepted Answer

Substitute the standard trigonometric values: sin 30° = 1/2, cos 45° = 1/√2, sin 45° = 1/√2, cos 30° = √3/2. Multiply (1/2 * 1/√2) * (1/√2 * √3/2) to get 1/2√3.

Question 2

Rearranging the letters “AKBLU”, we get the capital of

Accepted Answer

Rearranging the letters AKBLU forms 'KABUL'. Kabul is the capital city of Afghanistan. Thus, option 1 is correct.

Question 3

Which of the following is NOT true with reference to a real number?

Accepted Answer

Real numbers include all rational and irrational numbers. Every real number corresponds to a unique point on the number line, making option 2 incorrect.

Question 4

Hema takes a total of 9 hours 55 min to walk a certain distance and then cycling back to the same from where she had started. She could walk both ways in 12 hours 30 min. The time she will take to cycle both ways is:

Accepted Answer

Let walking time be W and cycling time be C. W + C = 9h 55min. 2W = 12h 30min, so W = 6h 15min. Substitute W to find C = 3h 40min. For both ways cycling, 2C = 7h 20min.

Question 5

Type of a file in a computer can be identified by the____.

Accepted Answer

A file extension, like .txt or .jpg, is a suffix at the end of a file name that indicates its type and the program used to open it.

Question 6

If two-third of three-fifth of a number is 42, find one- third of that number.

Accepted Answer

Let the number be x. (2/3) * (3/5) * x = 42. This simplifies to (2/5) * x = 42, so x = 105. One-third of x is (1/3) * 105 = 35.

Question 7

The Ajanta Cave Paintings are a testimony to the golden age of----------- in India.

Accepted Answer

The Ajanta Caves are renowned for their rock-cut Buddhist cave monuments, which house ancient murals and frescoes depicting the life of Buddha and Jataka tales.

Question 8

The principle of gyroscope is NOT used in a______

Accepted Answer

Gyroscopes are used for orientation and stability. Computer mice, smartphones, and racing cars utilize gyroscopes for motion sensing. Inkjet printers use stepper motors for precise movement, not gyroscopes.

Question 9

What does GUI stand for with respect to a computer?

Accepted Answer

GUI is a common acronym in computing. It stands for Graphical User Interface, which allows users to interact with electronic devices through visual icons and indicators.

Question 10

Find the mode of the following data: 100, 120, 110, 90, 120, 140, 130, 120, 110, 100, 90, 140, 120, 100

Accepted Answer

The mode is the number that appears most frequently in a data set. In the given data, 120 appears 4 times, which is more than any other number.

Question 11

All rational numbers are --------- numbers.

Accepted Answer

Rational numbers are a subset of real numbers. Real numbers include both rational and irrational numbers, making 'Real' the correct encompassing category.

Question 12

Find the discount in percentage, if a book whose marked price is ₹ 90 is sold for ₹ 76.

Accepted Answer

Discount = Marked Price - Selling Price = 90 - 76 = ₹14. Discount percentage = (Discount / Marked Price) * 100 = (14/90) * 100 = 15.56%.

Question 13

If a panchayat is dissolved, elections are to be held within-

Accepted Answer

According to Article 243E of the Indian Constitution, if a Panchayat is dissolved, new elections must be held within six months from the date of its dissolution.

Question 14

Directions: (Q. 81–84): Study the following table and answer the questions given below.
The table contains the total number of students hired by IT companies I, II, III and the respective percentages of such hiring from colleges P. Q= R and S.
IT Company
No. of stu-dent hired
P(%)
Q(%)
R(%)
S(%)
I
1800
24
32
28
16
II
2400
27
30
25
18
III
1500
32
20
25
23

What is the total number of students hired by Company II from Colleges P, R and S?

Accepted Answer

Sum the number of students hired by Company II from Colleges P, R, and S: 576 + 624 + 480 = 1680. This is a direct calculation.

Question 15

Who discovered Electron?

Accepted Answer

J. J. Thomson discovered the electron in 1897 through his experiments with cathode ray tubes, identifying it as a fundamental particle.

Question 16

Directions: (Q. 81–84): Study the following table and answer the questions given below.
The table contains the total number of students hired by IT companies I, II, III and the respective percentages of such hiring from colleges P. Q= R and S.
IT Company
No. of stu-dent hired
P(%)
Q(%)
R(%)
S(%)
I
1800
24
32
28
16
II
2400
27
30
25
18
III
1500
32
20
25
23

Find the difference between the number of studentshired by Companies II and III from College R.

Accepted Answer

From the data, Company II hired 450 students and Company III hired 225 students from College R. The difference is 450 - 225 = 225.

Question 17

On which coast was the World’s largest Marine Protected Area (MPA) created in October 2016?

Accepted Answer

The Ross Sea region off Antarctica was designated as the world's largest Marine Protected Area in October 2016, protecting its unique ecosystem.

Question 18

Directions: (Q. 81–84): Study the following table and answer the questions given below.
The table contains the total number of students hired by IT companies I, II, III and the respective percentages of such hiring from colleges P. Q= R and S.
IT Company
No. of stu-dent hired
P(%)
Q(%)
R(%)
S(%)
I
1800
24
32
28
16
II
2400
27
30
25
18
III
1500
32
20
25
23

How many more students did all the three companiestogether hire from College P in comparison withCollege S?

Accepted Answer

Calculate total students hired from College P by all companies. Calculate total students hired from College S. Find the difference between these two sums to get the answer.

Question 19

Directions: (Q. 81–84): Study the following table and answer the questions given below.
The table contains the total number of students hired by IT companies I, II, III and the respective percentages of such hiring from colleges P. Q= R and S.
IT Company
No. of stu-dent hired
P(%)
Q(%)
R(%)
S(%)
I
1800
24
32
28
16
II
2400
27
30
25
18
III
1500
32
20
25
23

What is the difference between the number of students hired by Company III from College P and that hired by Company I from College Q?

Accepted Answer

From the data, Company III hired 342 students from College P. Company I hired 246 students from College Q. The difference is 342 - 246 = 96.

Question 20

The famous Brihadeeshwara Temple is located in ______

Accepted Answer

The Brihadeeshwara Temple, a UNESCO World Heritage site, is a prominent example of Dravidian architecture located in Thanjavur, Tamil Nadu.