RRB NTPC CBT 2 2017: questions with answers

The terms are n(n − 1): 0, 2, 6, 12, 20, 30, 42 (differences 2, 4, 6, 8, 10, 12). The blank is 12.

Kerala hosted the 35th National Games from 31 January to 14 February 2015, with Thiruvananthapuram as the main venue.

Constant acceleration means the velocity changes by the same amount every second – the velocity keeps changing while the acceleration itself stays constant and non-zero.

UNHCR is the Office of the United Nations High Commissioner for Refugees, the UN Refugee Agency, set up in 1950.

IAS officer Pawan Kumar Agarwal was appointed CEO of the Food Safety and Standards Authority of India (FSSAI) in December 2015.

Gain = 30 − 25 = Rs 5, and 5/25 × 100 = 20%.

Tamu Massif, an extinct underwater shield volcano in the north-west Pacific, was identified in 2013 as the largest single volcano on Earth by area.

Total parts = 2 + 5 + 6 = 13, so one part = 169/13 = Rs 13. Shares: 26, 65 and 78.

From PALE = 5293: P = 5, A = 2, L = 9, E = 3. From EARTH = 32681: R = 6. So PEARL = 5 3 2 6 9 = 53269.

Real numbers consist of the rational and the irrational numbers, so every irrational number (√2, π) is real.

3 min 20 s = 200 s costs Rs 25.50, so 5 min 30 s = 330 s costs 25.50 × 330/200 = Rs 42.075 ≈ Rs 42.1.

The fourth proportional x satisfies 12 : 18 = 20 : x, so x = 18 × 20/12 = 30.

3.24 × 4 = 12.96, and 12.96 ÷ 0.2 = 64.8 = 324/5.

Dissolved oxygen is the key indicator of a water body's health: aquatic life needs it, and organic pollution lowers it by raising the biological oxygen demand.

Xenon gets its name from the Greek 'xenos', meaning stranger or foreigner, so it is called the stranger gas.

With 25 students and 8 scoring below her, Rashmi's rank = 25 − 8 = 17. Neither statement alone gives this, so both are needed.

He receives 1150 g when buying 1 kg and gives only 850 g when selling 1 kg. His money grows by a factor of 1150/850 ≈ 1.3529, a gain of about 35.29%.

The height is 2 m = 200 cm. Volume = πr²h = 22/7 × 2² × 200 = 17600/7 cubic cm.

The Jawahar Rozgar Yojana, a wage-employment programme for the rural poor, was launched on 1 April 1989 by merging NREP and RLEGP.

ExoMars is a joint programme of the European Space Agency and Russia's Roscosmos. Its Trace Gas Orbiter was launched in March 2016.

10584 ÷ 168 = 63, so 63 − 63 = 0.

As decimals: 2/7 ≈ 0.286, 0.3 and 4/9 ≈ 0.444. Ascending: 2/7, 0.3, 4/9.

The Pranhita is formed by the Wardha and Wainganga rivers (the Wardha having received the Penganga) and is the largest tributary of the Godavari.

Boys = 2/5 × 200 = 80, so girls = 200 − 80 = 120.

The Meenakshi Amman Temple, dedicated to Meenakshi (Parvati) and Sundareswarar (Shiva), is in Madurai, Tamil Nadu.

sin x = 4/5 gives cos x = 3/5. sec x = 5/3 and tan x = 4/3, so sec x + tan x = 9/3 = 3.

According to the official RRB key, Korada Ramana is associated with weightlifting.

Subscribers to at least one paper = 5000 − 1200 = 3800. Both = 2700 + 1800 − 3800 = 700.

The Indian Express only = 2700 − 700 (both) = 2000.

'When' asks about time; 'where' asks about place.

Each group has letters 2 apart, and each group starts 6 letters after the previous one: M, S, Y, E (wrapping round). The next group is E, G, I = EGI.

Mohiniyattam, a graceful solo dance traditionally performed by women, is a classical dance form of Kerala.

Quarterly compounding at 20% a year means 5% per quarter, and 6 months = 2 quarters. Amount = 14000 × 1.05² = 14000 × 1.1025 = Rs 15,435.

The Kyoto Protocol was adopted at the Kyoto Climate Change Conference (COP 3) in December 1997.

Sum = 8 + 0 + 3 + 3 + 1 + 7 + 4 + 1 + 4 + 4 = 35. Mean = 35/10 = 3.5.

Moving up from the surface: troposphere, stratosphere (with the ozone layer), mesosphere, then thermosphere.

The Bramble Cay melomys, a rodent from a tiny Great Barrier Reef island, was reported in 2016 as the first mammal driven extinct by human-induced climate change (sea-level rise).

TUROOND rearranges to DURONTO, the name of Indian Railways' non-stop express trains.

The statement is about Ayurveda's popularity in the West. It says nothing about its popularity in India or about allopathy, so neither conclusion follows.

The Ten Degree Channel, about 150 km wide, separates the Andaman Islands from the Nicobar Islands. The Nine Degree Channel separates Lakshadweep from Minicoy.

In March 2016 UNESCO added the Agasthyamala Biosphere Reserve in the Western Ghats (Kerala–Tamil Nadu) to its World Network of Biosphere Reserves.

The work is 18 × 7 = 126 man-days. With 15 men it takes 126/15 = 8.4 days.

Each term is n³ + 1: 0 + 1, 1 + 1, 8 + 1, 27 + 1, 64 + 1. Next: 125 + 1 = 126.

Kamal < Govind < Ashish and Naren < Kamal, so Naren is shorter than Kamal, Govind and Ashish. Naren < Jeyanth too. Naren is the shortest.

Statement (i) says Govind is taller than Kamal, so 'Kamal is shorter than Govind' is certain. Jeyanth's position relative to Govind and Kamal is not fixed, so the other options cannot be deduced.

Ashish is taller than Govind (and so Kamal and Naren) and taller than Jeyanth, so Ashish is the tallest.

All caps are books and all books are pens, so all caps are pens – I is false. Since all caps are pens, some pens are caps – II follows.

The statement says the Industrial Revolution brought about the modern age, i.e. a revolution transforms (overhauls) society – II follows. Nothing is said about disparity between rich and poor causing revolutions.

The Almatti Dam is on the Krishna river in Bijapur (Vijayapura) district, Karnataka, part of the Upper Krishna Project.

Replacing the letters: 18 × 12 ÷ 4 + 5 − 6 = 216 ÷ 4 + 5 − 6 = 54 − 1 = 53.

A DVD stores data as pits read by a laser, so it is an optical disk, like a CD or Blu-ray.

HCF = product ÷ LCM = 3360/96 = 35.

The RBI printed Rs 10,000 notes in 1938 and again in 1954; they were demonetised in 1946 and 1978. This is the highest denomination it has ever printed.

Railway Minister Suresh Prabhu launched Mission 'Zero Accident' (2016–17 Rail Budget) to eliminate unmanned level crossings and add train-protection systems.

Chandrayaan-1, launched in October 2008, was India's first lunar mission and helped discover water molecules on the Moon.

Win rates: First 5/8, Second 4/8, Third 5/7, Fourth 6/9, Fifth 4/6, Sixth 3/6, Seventh 2/6. The seventh (33%) was the worst.

Total wins = 5 + 4 + 5 + 6 + 4 + 3 + 2 = 29.

The third tournament has the best win rate: 5 out of 7 ≈ 71%.

29 wins out of 50 matches (8 + 8 + 7 + 9 + 6 + 6 + 6) = 58%.

Decoding option 4: 7 + 7 − 7 ÷ 7 < 14, i.e. 14 − 1 = 13 < 14, which is true. For example option 1 becomes 9 ÷ 9 + 9 < 9, i.e. 10 < 9, which is false.

Losoong (Namsoong), the Sikkimese New Year and harvest festival of the Bhutia and Lepcha communities, is celebrated in Sikkim.

A speaker is heard by a listener; a film is watched by a viewer.

Under Article 66 the Vice-President is elected by an electoral college of the members of both Houses of Parliament (the nominated members also vote). Of the options, election by the members of both Houses is correct.

Walking both ways takes 12 h 20 min, so one way on foot = 6 h 10 min. Running one way = 9 h 50 min − 6 h 10 min = 3 h 40 min, so running both ways = 7 h 20 min.

Diamond is the hardest natural substance, and in this code diamond is called gold.

Anwesha, launched by the Odisha government in 2015, places tribal (ST) and SC students in good private schools in urban areas, with hostel support.

Buses 5 minutes apart at 10 km/h are 10 × 5/60 = 5/6 km apart. Meeting them every 3 minutes: (10 + v) × 3/60 = 5/6, so 10 + v = 50/3 and v = 20/3 = 6 2/3 km/h.

Kathak, Kathakali and Bharatanatyam are classical dances from different regions, but Madhubani is a folk painting style of Bihar, not a dance. There is no common similarity.

Under Article 81 the Lok Sabha has not more than 530 members directly elected from the states and not more than 20 from the Union Territories.

With cost price C, the selling prices are 1.04C and 1.08C. Ratio = 104 : 108 = 26 : 27.

All start with 'Qua'. The fourth letter is l in Qualify and r in the others; l comes before r, so Qualify is first.

The 2016 Rail Budget proposed SMART (Specially Modified Aesthetic Refreshing Travel) coaches with features such as bio-vacuum toilets, vending machines and better interiors.

A tailor, a carpenter and a goldsmith make physical products with their hands (clothes, furniture, jewellery). A teacher provides a service.

China passed its first counter-terrorism law in December 2015, giving security agencies wide powers, including over technology companies.

SI = 600 × 6 × 4/100 = Rs 144. Amount = 600 + 144 = Rs 744.

A patch is a piece of code applied to installed software to fix bugs or security holes.

Decoding (+ → ×, ÷ → +, − → ÷, × → −): the numerator becomes (36 − 4) ÷ 8 − 4 = 4 − 4 = 0, and the denominator 4 × 8 − 16 + 1 = 17. The value is 0/17 = 0.

The Simon Commission (1927), sent to review India's constitutional reforms, had seven British members and no Indian. It was boycotted with the slogan 'Simon Go Back'.

Australian fast bowler Josh Hazlewood was named the ICC Emerging Player of the Year 2015.

Let each part be d km. Time = d/2 + d/4 + d/6 = d(6 + 3 + 2)/12 = 11d/12 hours. This equals 55 minutes = 11/12 hour, so d = 1 and the total distance = 3 km.

The Justice A.P. Shah Committee examined ONGC's complaint that Reliance Industries had drawn gas from ONGC's adjoining blocks in the Krishna–Godavari basin; it found Reliance had been unjustly enriched (2016).

The Saha Institute of Nuclear Physics, named after Meghnad Saha, is in Kolkata, West Bengal.

Article 21A (added in 2002) and the Right of Children to Free and Compulsory Education Act, 2009 came into force on 1 April 2010.

Article 51A lists duties such as safeguarding public property, preserving our composite culture and cherishing the ideals of the freedom struggle. Voting is a right, not a fundamental duty.

On the Urjit Patel Committee's recommendation, in 2014 the RBI adopted the new CPI (combined, rural and urban) as the key measure of inflation, replacing WPI.

Numbers 3, 6, 11, 18 increase by 3, 5, 7, so next is +9 = 27. Letters F, G, I, L increase by 1, 2, 3, so next is +4 = P. The term is 27P.

(3y)² + x² − (2y)² = 9y² + x² − 4y² = x² + 5y².

Career diplomat Bhagwant Singh Bishnoi took charge as India's Ambassador to Thailand in January 2016.

The first Rs 4000 grows for 2 years: 4000 × 1.05² = 4410. The second grows for 1 year: 4200. Total = Rs 8610.

In 2015 NASA's Cassini data showed that Saturn's moon Enceladus has a global liquid-water ocean beneath its icy crust.

Both statements are 'some' statements linked through birds, so no definite relation between ducks and cows follows. Neither conclusion follows.

CI = 6500 × (1.04² − 1) = 6500 × 0.0816 = Rs 530.40.

Producers (green plants) form the base of the food pyramid and are the most numerous; numbers fall at each higher trophic level.

The code is the sum of letter positions: G = 7 and EXCEL = 5 + 24 + 3 + 5 + 12 = 49. ACCEPT = 1 + 3 + 3 + 5 + 16 + 20 = 48.

Elephants, bears and rhinos are warm-blooded, have hair and feed their young with milk – they are mammals.

INSAT-2E was launched in April 1999 by an Ariane 4 rocket from Kourou, French Guiana.

If Vishal does 1 unit a day, Rajesh does 2, so together 3. The work = 3 × 28 = 84 units, and Vishal alone takes 84 days.

15% of 75 = 0.15 × 75 = 11.25.

The OPCW, which implements the Chemical Weapons Convention and won the 2013 Nobel Peace Prize, is headquartered in The Hague, Netherlands.

On 12 March 1930 Gandhi began the Dandi March from Sabarmati Ashram, reaching Dandi on 6 April to break the salt law.

Rakesh is Renu's son and Dinesh is Rakesh's brother, so Dinesh is also Renu's son.

Together the holes empty 1/8 + 1/12 = 3/24 + 2/24 = 5/24 of the tank per minute, so it takes 24/5 = 4 4/5 minutes.

CP = 17000/0.85 = Rs 20,000. For a 15% profit, SP = 20000 × 1.15 = Rs 23,000.

Percentage = 21/25 × 100 = 84%.

The Geneva II Conference (January–February 2014) was a UN-backed peace conference on ending the Syrian civil war.

In binary units, 1 terabyte = 1024 gigabytes.

The 2016 Rail Budget rested on three pillars: Nav Arjan (new revenues), Nav Manak (new norms) and Nav Sanrachna (new structures). 'Nav Nirman' was not one of them.

1441 − 1048 = 393 = 3 × 131. Both numbers are multiples of 131: 1048 = 8 × 131 and 1441 = 11 × 131. HCF = 131.

The pairs are adjacent parts of the limbs: the leg ends in the foot just as the hand meets the arm at the wrist. The official key gives Leg.

Number of sides = 360/exterior angle = 360/10 = 36.

The numbers are 16 and 32, so the LCM is 32.

In December 2015 Apple promoted Jeff Williams to Chief Operating Officer, a role Tim Cook held before becoming CEO.

Chitra is Dinesh's sister, so Bavana (Dinesh's mother) is also Chitra's mother – Arun's wife. Manish is Arun's brother, so Bavana is his sister-in-law.

With 10 values (already in order) the median is the mean of the 5th and 6th values: (8 + 8)/2 = 8.

Surface area = 4πr² = 4 × 22/7 × 4 = 352/7 sq cm.

From I: 'Always keep' = 'tee lee' (common to both), so pin = smiling. From II: 'smiling' is common with the question sentence, and 'pin' is the common code, so pin = smiling. Either statement alone is sufficient.

Bit is short for binary digit – the smallest unit of data, either 0 or 1.

0.5656… = 56/99, so 2.5656… = 2 56/99.

Malini's son's maternal uncle is Malini's brother. He is the old man's son, so the old man is Malini's father.

Total internal reflection can happen only when light goes from a denser to a rarer medium at more than the critical angle. Diamond to air fits; the other options go from rarer to denser.