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RRB NTPC Undergraduate CBT 1 2024 · Shift 1

RRB NTPC Undergraduate CBT 1 20 Aug 2025 Shift 1 – Question Paper

100 questions · 100 marks · 90 minutes · +1 for a correct answer, −1/3 for a wrong one. With answer key and detailed solutions in Hindi and English.

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Paper pattern

SectionQuestionsMarks
General Awareness4040
Mathematics3030
General Intelligence and Reasoning3030

Sample questions from this paper

Q1.
In which state did the Indian Army conduct the tri-service integrated multi-domain warfare exercise, 'Prachand Prahaar', in March 2025?
मार्च 2025 में भारतीय सेना ने त्रि-सेवा एकीकृत बहु-क्षेत्रीय युद्ध अभ्यास ‘प्रचंड प्रहार’ किस राज्य में आयोजित किया?
  1. AMeghalayaमेघालय
  2. BSikkimसिक्किम
  3. CAssamअसम
  4. DArunachal Pradeshअरुणाचल प्रदेश
Show answer

Concept: 'Prachand Prahaar' was a tri-service integrated multi-domain warfare exercise held in March 2025.

  1. It was conducted by the Indian Army with the Indian Navy and Indian Air Force in the high-altitude terrain of Arunachal Pradesh.
  2. Aim: test joint surveillance, command-control and precision fire power along the eastern front.
  3. Sikkim, Assam and Meghalaya were not the venue of this exercise.

Trick: Prachand Prahaar = 'Pr' of Pradesh, i.e. Arunachal Pradesh on the eastern border.

Answer: (D) Arunachal Pradesh

अवधारणा: 'प्रचंड प्रहार' मार्च 2025 में आयोजित त्रि-सेवा एकीकृत बहु-क्षेत्रीय युद्ध अभ्यास (multi-domain warfare exercise) था।

  1. इसे भारतीय सेना ने नौसेना और वायुसेना के साथ अरुणाचल प्रदेश के ऊँचाई वाले क्षेत्र में आयोजित किया।
  2. उद्देश्य: पूर्वी मोर्चे पर संयुक्त निगरानी, कमान-नियंत्रण और सटीक मारक क्षमता की जाँच।
  3. सिक्किम, असम व मेघालय इसका स्थल नहीं थे।

ट्रिक: प्रचंड प्रहार – 'प्र' से प्रदेश – अरुणाचल प्रदेश।

उत्तर: (D) अरुणाचल प्रदेश

RRB NTPC Undergraduate CBT 1General AwarenessDefence Exercises
Q41.
The number of prime numbers lying between 476 and 485, both included, is:
476 और 485 (दोनों को सम्मिलित करते हुए) के बीच स्थित अभाज्य संख्याओं की संख्या है:
  1. A2
  2. B1
  3. C4
  4. D6
Show answer

Concept: A prime has no divisor other than 1 and itself. To test n, check primes up to n; here 485≈22, so test 2, 3, 5, 7, 11, 13, 17, 19.

  1. Even numbers 476, 478, 480, 482, 484 and 485 (ends in 5) are out.
  2. 477=3×159, 483=3×161 (digit sums 18 and 15).
  3. 481=13×37.
  4. 479 is not divisible by 2, 3, 5, 7, 11, 13, 17 or 19, so it is prime.

Trick: Strike out evens and multiples of 3 and 5 first; only 479 and 481 remain to test.

Answer: (B) 1

अवधारणा: अभाज्य संख्या का 1 और स्वयं के अलावा कोई भाजक नहीं होता। n की जाँच हेतु n तक के अभाज्यों से भाग दें; 485≈22, अतः 2, 3, 5, 7, 11, 13, 17, 19 से जाँचें।

  1. सम संख्याएँ 476, 478, 480, 482, 484 और 485 (अंत में 5) बाहर।
  2. 477=3×159, 483=3×161 (अंकों का योग 18 व 15)।
  3. 481=13×37।
  4. 479 किसी भी 2, 3, 5, 7, 11, 13, 17, 19 से विभाज्य नहीं – अतः अभाज्य।

ट्रिक: पहले सम, 3 और 5 के गुणज काटें; केवल 479 और 481 जाँचने बचते हैं।

उत्तर: (B) 1

RRB NTPC Undergraduate CBT 1MathematicsPrime Numbers
Q71.
What should come in place of the question mark (?) in the given series?
12 21 40 69 108 ?
दी गई श्रृंखला में प्रश्न चिह्न (?) के स्थान पर क्या आना चाहिए?
12 21 40 69 108 ?
  1. A157
  2. B143
  3. C137
  4. D149
Show answer

Concept: Look at the differences between consecutive terms.

  1. Differences: 21−12=9, 40−21=19, 69−40=29, 108−69=39
  2. Differences increase by 10; next difference =49
  3. 108+49=157

Trick: Differences 9, 19, 29, 39, 49 – all end in 9.

Answer: (A) 157

अवधारणा: क्रमागत पदों का अंतर देखें।

  1. अंतर: 9, 19, 29, 39
  2. अंतर 10-10 बढ़ रहा है; अगला अंतर =49
  3. 108+49=157

ट्रिक: अंतर 9, 19, 29, 39, 49।

उत्तर: (A) 157

RRB NTPC Undergraduate CBT 1General Intelligence and ReasoningNumber series

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