RRB NTPC 2025-12-06-2025-1 RRB Question Paper

RRB NTPC 2025 - Graduate Level Question Papers

RRB NTPC 2025-12-06-2025-1 RRB Questions

31.
Why is the discovery of penicillin considered revolutionary in medicine?
A.
It treated pain rather than infections.
B.
It began the antibiotic era.
C.
It was used for colouring bacteria.
D.
It was used only in animals.
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ANSWER :
B. It began the antibiotic era.
32.
The Michaelis-Menten constant (Km) of an enzyme is defined as:
A.
The substrate concentration at which the reaction rate is half of Vmax
B.
The maximum reaction rate (Vmax)
C.
The enzyme concentration required for half-maximal catalysis
D.
The inhibitor concentration that reduces enzyme activity by 50%
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ANSWER :
A. The substrate concentration at which the reaction rate is half of Vmax
33.
Rahul marks the price of his article 64% more than its cost price. If he sells the article for ₹59,860 after allowing a discount of 50%, then what will be the cost price (in ₹) of the article?
A.
72,999
B.
73,001
C.
72,997
D.
73,000
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ANSWER :
D. 73,000
34.

If a² + b² = 83, a × b = 6, and a > b, find \(\frac{a-b}{a+b}\).

A.

\(\sqrt{\frac{62}{95}}\)

B.

\(\sqrt{\frac{71}{95}}\)

C.

\(\frac{71}{95}\)

D.

\(\frac{62}{95}\)

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ANSWER :

B. \(\sqrt{\frac{71}{95}}\)

35.
What should come in place of the question mark (?) in the given series?
972 970 966 960 952 ?
A.
942
B.
940
C.
438
D.
941
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ANSWER :
A. 942
36.
In a certain code language, 'PREY' is coded as '6482' and 'YOLK' is coded as '3671'. What is the code for 'Y' in the given code language?
A.
3
B.
6
C.
1
D.
2
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ANSWER :
B. 6
37.
The average of eight numbers is 15. The average of five of these numbers is 18. The average of the remaining three numbers is:
A.
12
B.
11
C.
9
D.
10
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ANSWER :
D. 10
38.
A, B, C, D, E and F live on six different floors of the same building. The lowermost floor in the building is numbered 1, the floor above it, number 2 and so on, till the topmost floor is numbered 6. B lives on an even numbered floor but not 6. The sum of floors on which F and B live is 7. D lives immediately above C. The sum of floors on which B and E live is 3. How many people live below D?
A.
3
B.
2
C.
1
D.
4
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ANSWER :
A. 3
39.
Calculate the volume of the cube having a total surface area of 216 cm².
A.
343 cm³
B.
180 cm³
C.
216 cm³
D.
125 cm³
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ANSWER :
C. 216 cm³
40.
Where was the World Sustainable Development Summit (WSDS) held in March 2025?
A.
Hyderabad, India
B.
New Delhi, India
C.
Bengaluru, India
D.
Mumbai, India
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ANSWER :
B. New Delhi, India