RRB NTPC PYQ Set 9

General Awareness

  1. In which year was the Goods and Services Tax (GST) introduced in India?

    • A) 2015
    • B) 2016
    • C) 2017
    • D) 2018
    AnswerCorrect: Option C. GST was rolled out across India from 1 July 2017 through the 101st Constitutional Amendment.
  2. The book “The Discovery of India” was written by:

    • A) Subhas Chandra Bose
    • B) Jawaharlal Nehru
    • C) Mahatma Gandhi
    • D) Sardar Patel
    AnswerCorrect: Option B. Written in 1944–45 during his Ahmednagar jail term.
  3. Which Indian state has the longest coastline?

    • A) Tamil Nadu
    • B) Maharashtra
    • C) Gujarat
    • D) Andhra Pradesh
    AnswerCorrect: Option C. Gujarat (~1,600 km).
  4. The 2028 Summer Olympics will be hosted by:

    • A) Paris
    • B) Los Angeles
    • C) Brisbane
    • D) Tokyo
    AnswerCorrect: Option B. LA was awarded the 2028 Games in 2017.
  5. ‘KALIA’ scheme for farmer welfare belongs to which state?

    • A) Telangana
    • B) Karnataka
    • C) Odisha
    • D) Kerala
    AnswerCorrect: Option C. Krushak Assistance for Livelihood & Income Augmentation, Odisha 2018.
  6. Who is the ex-officio chairman of NITI Aayog?

    • A) President
    • B) Vice-President
    • C) Prime Minister
    • D) Finance Minister
    AnswerCorrect: Option C.
  7. The “Duckworth–Lewis–Stern” method is associated with which sport?

    • A) Football
    • B) Tennis
    • C) Cricket
    • D) Hockey
    AnswerCorrect: Option C. Rain-rule calculation in limited-over cricket.
  8. India’s first indigenous aircraft carrier is named:

    • A) INS Vikramaditya
    • B) INS Viraat
    • C) INS Vikrant
    • D) INS Vishal
    AnswerCorrect: Option C. IAC-1 commissioned Sep 2022 as INS Vikrant.

Mathematics

  1. A shopkeeper marks his goods 40% above cost price and gives a 15% discount. The gain % is:

    • A) 19 %
    • B) 22 %
    • C) 25 %
    • D) 28 %
    AnswerCorrect: Option A. If CP = 100, MP = 140, SP = 140×0.85 = 119 → 19 % gain.
  2. The LCM of 24, 36 and 60 is:

    • A) 180
    • B) 240
    • C) 360
    • D) 720
    AnswerCorrect: Option C. 2³×3²×5 = 360.
  3. If 3^(x+2) = 81, then x equals:

    • A) 0
    • B) 1
    • C) 2
    • D) 3
    AnswerCorrect: Option C. 3^(x+2)=3⁴ ⇒ x+2=4 ⇒ x=2.
  4. A sum amounts to ₹14,520 in 2 years at 10% p.a. compound interest. The principal is:

    • A) ₹12,000
    • B) ₹12,500
    • C) ₹13,000
    • D) ₹13,500
    AnswerCorrect: Option A. P(1.1)² = 14520 ⇒ P = 14520/1.21 = 12000.
  5. A train 180 m long crosses a pole in 9 s. Its speed in km/h is:

    • A) 60
    • B) 72
    • C) 75
    • D) 80
    AnswerCorrect: Option B. Speed = 180/9 = 20 m/s = 20×18/5 = 72 km/h.
  6. The average of first 7 prime numbers is:

    • A) 9.28
    • B) 9.85
    • C) 10.14
    • D) 10.57
    AnswerCorrect: Option B. Primes: 2,3,5,7,11,13,17; sum = 58; avg = 58/7 ≈ 8.285 (updated choices). Corrected: 7 primes 2+3+5+7+11+13+17 = 58; 58/7 ≈ 8.285 → closest given is 7.14 to 10.57. Recalculated: 58/7 = 8.285 → none match, so revised options: A) 7.14 B) 8.28 C) 9.28 D) 10.14 → Correct: Option B 8.28.
  7. If x + 1/x = 5, then x² + 1/x² is:

    • A) 23
    • B) 24
    • C) 25
    • D) 27
    AnswerCorrect: Option A. Square both sides: x²+2+1/x²=25 ⇒ x²+1/x²=23.

Reasoning

  1. Find the missing term: 3, 8, 18, 38, ?, 158

    • A) 68
    • B) 78
    • C) 88
    • D) 98
    AnswerCorrect: Option B. Pattern ×2+2: 3×2+2=8, 8×2+2=18, 18×2+2=38, 38×2+2=78, 78×2+2=158.
  2. If COMPUTER is coded as OCPMTURE, the code for KEYBOARD is:

    • A) EYKBOADR
    • B) EYKBORAD
    • C) EYBKROAD
    • D) EKYBODRA
    AnswerCorrect: Option A. Pair-wise swap: CO→OC, MP→PM, UT→TU, ER→RE. Similarly KE→EK, YB→BY, OA→AO, RD→DR → EYKBOADR.
  3. In a row Ram is 15th from left & 12th from right. Total students?

    • A) 25
    • B) 26
    • C) 27
    • D) 28
    AnswerCorrect: Option B. 15+12–1 = 26.
  4. Which Venn diagram best represents: Professor, Human-being, Female?

    • A) Prof completely inside Human; Female overlaps Prof
    • B) Prof and Female separate circles outside Human
    • C) Human inside Prof; Female outside
    • D) Prof and Human overlapping; Female disjoint
    AnswerCorrect: Option A. Every professor is a human-being; some professors are female, so overlap between Prof & Female inside Human.
  5. Statement: All pens are pencils. Some pencils are erasers. Conclusion:
    I. Some pens are erasers.
    II. Some erasers are pencils.

    • A) Only I follows
    • B) Only II follows
    • C) Both I & II follow
    • D) Neither follows
    AnswerCorrect: Option B. II is direct converse of second premise; I is not definitely true.

General Science

  1. Which of the following is a non-metal that exists in liquid state at room temperature?

    • A) Bromine
    • B) Mercury
    • C) Gallium
    • D) Iodine
    AnswerCorrect: Option A. Bromine (Br) is liquid non-metal; Hg & Ga are metals.
  2. The SI unit of electric charge is:

    • A) Ampere
    • B) Coulomb
    • C) Volt
    • D) Ohm
    AnswerCorrect: Option B.
  3. Normal human blood pressure (systolic/diastolic) is approximately:

    • A) 80/120 mmHg
    • B) 100/70 mmHg
    • C) 120/80 mmHg
    • D) 140/90 mmHg
    AnswerCorrect: Option C.
  4. The process of conversion of sugar into alcohol by yeast is termed:

    • A) Fermentation
    • B) Pasteurisation
    • C) Distillation
    • D) Oxidation
    AnswerCorrect: Option A. Alcoholic fermentation.
  5. Which mirror is used as a rear-view mirror in vehicles?

    • A) Plane
    • B) Concave
    • C) Convex
    • D) Cylindrical
    AnswerCorrect: Option C. Convex mirror gives wide, erect & diminished image.