RRB NTPC 2025-29-08-2025-3 RRB Question Paper

RRB NTPC 2025-29-08-2025-3 RRB Questions

41.

Section - Mathematics
The value of \( \frac{3}{4} \) + \(\left(\frac{1}{1+\frac{5}{6}}\right)\) - \( \frac{3}{5} \) is

A.

\(\frac{145}{229}\)

B.

\(\frac{153}{220}\)

C.

\(\frac{146}{225}\)

D.

\(\frac{162}{227}\)

ANSWER :

B. \(\frac{153}{220}\)

42.

The simple interest on a certain sum for 3 \( \frac{5}{9} \) years at the rate of 2.7% per annum is ₹2,808.
What will be the amount payable on the same sum at the rate of 9.2% per annum simple interest in 5 \( \frac{2}{3} \) years?

A.

₹44,499

B.

₹44,482

C.

₹44,514

D.

₹44,489

ANSWER :

A. ₹44,499

43.

Find the volume (in cm³) of a sphere having a diameter of 16.8 cm, giving your answer correct to two decimal places.
Take Π = \( \frac{22}{7} \).

A.

2493.71

B.

2503.71

C.

2473.71

D.

2483.71

ANSWER :

D. 2483.71

44.
The marks scored by 10 students are given below.
12, 13, 14, 11, 16, 11, 12, 17, 15, 12
The mode of the data is:
A.
14
B.
13
C.
12
D.
11
ANSWER :
C. 12
45.

The value of \(\sqrt{400}\) + \(\sqrt{0.0289}\)- \(\sqrt{7.84}\) =

A.

16.15

B.

17.37

C.

15.86

D.

12.83

ANSWER :

B. 17.37

46.

Simplify: 3((\( \frac{6}{3} \))x² - 29x + 14) - 6(x² + 5x - 13)

A.

117x + 120

B.

117x - 120

C.

-117x - 120

D.

-117x + 120

ANSWER :

D. -117x + 120

47.
If the sum of the interior angles of a regular polygon is equal to four times the sum of its exterior angles, then what is the number of diagonals in the polygon?
A.
31
B.
33
C.
35
D.
28
ANSWER :
C. 35
48.

The selling price of 50 books is equal to the cost price of 15 books. Find the loss or gain percentage on these books.

A.

\( \frac{100}{35} \)% gain

B.

70% loss

C.

\( \frac{100}{35} \) % loss

D.

70% gain

ANSWER :

B. 70% loss

49.
Find the mean proportional of 81 and 36.
A.
56
B.
52
C.
54
D.
53
ANSWER :
C. 54
50.

By how much is 65% of 75 greater than \( \frac{3}{5} \) of 35?

A.

27.75

B.

25.75

C.

21.75

D.

24.75

ANSWER :

A. 27.75