RRB NTPC CBT 2 2017: సమాధానాలతో ప్రశ్నలు

Product of two numbers = HCF × LCM, so HCF = 2664/74 = 36.

Collateral is an asset owned by the borrower and pledged to the lender as security. The lender can seize it only if the loan is not repaid.

Vinegar is a dilute solution (about 4–8%) of acetic acid (ethanoic acid, CH₃COOH) in water.

The Flag Code of India, effective from 26 January 2002, allows private citizens to fly the national flag on all days, consistent with its dignity. The bans on letting it touch the ground, using it for communal gain or as a festoon remain.

Steeplechaser Lalita Babar, who reached the 3000 m steeplechase final at the Rio Olympics, received the Arjuna Award for athletics in 2016.

A flower develops from a bud; a plant develops from a seed.

With the common denominator 24: 2/3 = 16/24, 17/24 and 3/4 = 18/24. Ascending: 2/3, 17/24, 3/4.

The first Rs 100 grows for 2 years: 100 × 1.05² = 110.25. The second Rs 100 grows for 1 year: 105. Total = Rs 215.25.

'Two Leaves and a Bud' (1937) was written by Mulk Raj Anand. R. K. Narayan wrote 'The Bachelor of Arts', 'The English Teacher' and 'Waiting for the Mahatma'.

Henri Becquerel discovered radioactivity in 1896 from uranium salts and shared the 1903 Nobel Prize in Physics with Pierre and Marie Curie.

COME written backwards is EMOC. TRAIN written backwards is NIART.

At Rio 2016 Michael Phelps won the 200 m individual medley for the fourth Olympics in a row (2004–2016).

x(x − 2) + 3x(x − 3) = x² − 2x + 3x² − 9x = 4x² − 11x.

U = 1, T = 2, E = 3, Y = 4, B = 5, A = 6. The order 5 3 6 1 2 4 gives B E A U T Y = BEAUTY.

The Manhattan Project (1942–1946), led by the USA with the UK and Canada, brought together scientists such as Oppenheimer and Fermi to develop the first atomic bombs.

From the clues: Sumitha > Rekha > Sharmila > Reena > Gayathri in age. Gayathri is the youngest.

If Lokesh does 1 unit a day, Akshat does 2, so together 3. The work = 3 × 7 = 21 units, and Lokesh alone takes 21 days.

IRNSS (Indian Regional Navigation Satellite System, now NavIC) is India's navigation satellite constellation. GSLV, PSLV and SLV-3 are launch vehicles.

The work = 18 × 25 = 450 man-days. With 10 men it takes 450/10 = 45 days.

July, October and January have 31 days but June has 30. The preceding months (June, September, December, May) do not all have 31 days, and the following months do not all have fewer days. There is no clear similarity.

Boys = 3/10 × 200 = 60, so girls = 200 − 60 = 140.

(7^½)⁴ = 7² = 49, and 7² ÷ 49 = 1.

Scheme D falls every month: 290, 150, 125, 115, 100, 40. The other schemes rise in some months.

Scheme B in February 2009 = 150. In December 2008, B + C = 110 + 40 = 150.

Scheme A: December 2008 = 160 and January 2009 = 80. Difference = 80 crores.

Totals over the six months: A = 735, B = 585, C = 265, D = 820, E = 1160. Scheme E has the highest total subscription.

Knowing the scheduled time (15:30) and that the train normally runs on time does not tell us when it actually left today. The data is insufficient.

Karate made its Olympic debut at the Tokyo 2020 Games, along with skateboarding, sport climbing and surfing.

The Ganges River Dolphin was declared India's National Aquatic Animal in 2009.

Together the holes empty 1/9 + 1/3 = 4/9 of the glass per minute, so it takes 9/4 = 2 1/4 minutes.

The terms are squares of consecutive primes: 2² = 4, 3² = 9, 5² = 25, 7² = 49, 11² = 121, 13² = 169.

From the codes: R = 4, A = 7, C = 9, E = 3, F = 1, T = 5, O = 6. So REACT = 4 3 7 9 5 = 43795.

CP = 510/0.85 = Rs 600. For a 15% profit, SP = 600 × 1.15 = Rs 690.

In Windows, Ctrl + Y redoes the last undone action; Ctrl + Z undoes.

The fourth proportional x satisfies 14 : 28 = 21 : x, so x = 28 × 21/14 = 42.

In 2016 the SBI board approved merging Bharatiya Mahila Bank (and its associate banks) into the State Bank of India; the merger took effect on 1 April 2017.

Murud-Janjira is a sea fort on an oval rock island off Murud in Raigad district, Maharashtra, surrounded on all sides by the Arabian Sea.

2 min 30 s = 150 s costs Rs 6, so 3 min 20 s = 200 s costs 6 × 200/150 = Rs 8.

Article 81 caps the Lok Sabha at 550 elected members (530 from states, 20 from UTs). Article 331 then allowed the President to nominate up to 2 Anglo-Indians; this provision ended in 2020 with the 104th Amendment.

Each exterior angle = 180° − 168° = 12°. Number of sides = 360/12 = 30.

As the monkey falls, its potential energy is converted into kinetic energy while the total mechanical energy stays the same – an example of the law of conservation of energy.

Cycles 10 minutes apart at 6 km/h are 6 × 10/60 = 1 km apart. Meeting them every 8 minutes means (6 + v) × 8/60 = 1, so 6 + v = 7.5 and v = 1.5 km/h.

With cost price C, the selling prices are 1.08C and 1.10C. Ratio = 108 : 110 = 54 : 55.

On 2 October 2016 the UN Postal Administration issued a stamp honouring Carnatic singer M.S. Subbulakshmi, the first musician to perform at the UN General Assembly (1966), for her birth centenary.

Telex (Teleprinter Exchange) was a network of teleprinters connected through exchanges to send typed text messages.

The Human Development Index combines three dimensions: a long and healthy life (life expectancy), knowledge (schooling) and a decent standard of living (GNI per capita). Corporate governance is not one of them.

Percentage = 8/25 × 100 = 32%.

Replacing the letters: 15 ÷ 3 + 24 − 12 × 2 = 5 + 24 − 24 = 5.

Nagaland's Hornbill Festival, the 'festival of festivals', is held every year from 1 to 10 December at Kisama near Kohima.

Dividing by 100 moves the decimal point two places left: 7.7 ÷ 100 = 0.077.

All women are married, so some women are married (I follows). The educated women are also married, so some married people are educated (II follows). Both follow.

World Lion Day is observed every year on 10 August to raise awareness about lion conservation.

Barren Island in the Andaman Sea is the only confirmed active volcano in India (and South Asia).

cot x = 5/12 gives a 5–12–13 triangle: sec x = 13/5 and cosec x = 13/12. Sum = 156/60 + 65/60 = 221/60.

15% of 38 = 0.15 × 38 = 5.7.

Each letter of ACE moves 5 places forward to give FHJ. Applying +5 to OQS gives TVX.

Q is R's son and R is not his mother, so R is his father. P is married to R, so P is Q's mother. Q is the son of P.

U is Q's sister and S is P's daughter, so the children of P and R are Q (son), U and S (daughters). U has one brother, Q.

Males: R (father), Q (son) and T (R's brother) = 3. Females: P (mother), S and U (daughters) = 3. Ratio 1 : 1.

PALE → LEAP takes letters 3, 4, 2, 1 (L, E, A, P). Applying this to POSH (P1 O2 S3 H4) gives S, H, O, P = SHOP.

World Environment Day 2016, hosted by Angola, had the theme of zero tolerance for the illegal trade in wildlife, with the slogan 'Go Wild for Life'.

12 took Mathematics and 8 of them did not take Computer Science, so 12 − 8 = 4 took both.

All 25 took at least one subject. Those who did not take Mathematics = 25 − 12 = 13; they took only Computer Science.

Walking both ways takes 12 h 15 min, so one way on foot = 6 h 7.5 min. Cycling one way = 8 h 20 min − 6 h 7.5 min = 2 h 12.5 min, so cycling both ways = 4 h 25 min.

Calculators, computers and mobile phones perform computations. A printer is an output device that only prints what it receives.

2616 − 2289 = 327, and both numbers are multiples of it: 2289 = 7 × 327 and 2616 = 8 × 327. So the HCF is 327.

Guru Shikhar (1,722 m) on Mount Abu in Rajasthan is the highest peak of the Aravalli Range.

Volume = πr²h = 22/7 × 2.5 × 2.5 × 2 = 22/7 × 12.5 = 275/7 cubic cm.

Statement A gives a strong reason to drop ties: they are used to label low scorers, who feel discriminated against. Statement B, that the sports uniform has no tie, neither supports nor opposes the demand, so it is neutral.

Dr. Dhrubajyoti Ghosh was an ecologist known for his work on the East Kolkata Wetlands, which use wastewater for fisheries and farming. He received the Global 500 award.

Plasma is the straw-coloured liquid part of blood, about 55% of its volume, mostly water with proteins, salts and nutrients.

Airlander 10, built by the British firm Hybrid Air Vehicles, made its first flight at Cardington, England, in August 2016.

Modifier keys (Ctrl, Shift, Alt, Windows) change the action of other keys when held down. Tab works on its own to move focus or indent.

India beat Iran in the final in Ahmedabad to win the 2016 Kabaddi World Cup (standard style).

Total parts = 2 + 3 + 6 + 7 = 18, so one part = 162/18 = Rs 9. Shares: 18, 27, 54 and 63.

Football, baseball and hockey are outdoor field games played with a ball. Chess is an indoor board game.

The terms come in pairs (0.1, 0.9), (0.01, 0.09), (0.001, 0.009), each pair one-tenth of the one before. The blank is 0.001.

Bauxite (aluminium ore), tin and nickel are metallic minerals. Coal is a non-metallic mineral fuel of organic origin.

Machu Picchu, the 15th-century Inca citadel in the Andes, is in Peru.

American writer Paul Beatty won the 2016 Man Booker Prize for 'The Sellout', the first American winner of the prize.

SI = 1000 × 5 × 4/100 = Rs 200. The amount to pay = 1000 + 200 = Rs 1200.

Start facing North-West. 90° clockwise → North-East. 180° anticlockwise → South-West. 90° anticlockwise → South-East.

The Vindhya, Satpura and Aravalli ranges lie in India. The Hindu Kush lies mainly in Afghanistan and Pakistan.

The Fairy Queen, built in 1855, is listed by Guinness as the world's oldest working steam locomotive in regular service.

Total height of the 8 women = mean × number = 1.60 × 8 = 12.8 m (the men's data is not needed).

Decoding option 3: 9 − 6 ÷ 3 < 7 + 4, i.e. 9 − 2 = 7 < 11, which is true. For example option 1 becomes 14 ÷ 7 + 3 < 6 ÷ 3 + 2, i.e. 5 < 4, which is false.

He goes 10 km south, turns right (west) 5 km, turns right (north) 10 km – now 5 km due west of home – then turns left (west) 10 km. He is 15 km west of home.

Gain = 45 − 40 = Rs 5, and 5/40 × 100 = 12.5%.

On the first Republic Day, 26 January 1950, President Rajendra Prasad unfurled the flag at Irwin Stadium, now the Major Dhyan Chand National Stadium in New Delhi.

The Gazette of India is printed by the Government of India Press and published by the Controller of Publications (Department of Publication), its authorised publisher and custodian.

ASLV (Augmented Satellite Launch Vehicle), flown four times between 1987 and 1994, is a retired legacy launcher of ISRO. PSLV and GSLV are its operational launchers.

Let x = 0.065454…. Then 10000x = 654.5454… and 100x = 6.5454…. Subtracting, 9900x = 648, so x = 648/9900 = 18/275.

To support the Swachh Bharat Abhiyan launched on 2 October 2014, Indian Railways launched 'Swachh Rail – Swachh Bharat' to clean stations and trains.

First letters go Q, S, U, W, Y (+2); numbers 3, 5, 8, 12, 17 (+2, +3, +4, +5); last letters C, E, G, I, K (+2). Next term: Y17K.

The Pala dynasty ruled Bengal and Bihar (8th–12th centuries). The Pandyas, Satavahanas and Pallavas were South Indian (Deccan) dynasties.

The Constitution is the supreme law of India – very much a legal document – as well as the nation's rule book and the source of the rule of law and core political values.

Statement I says there are 3 children. Statement II says Dinesh has 2 sisters. Together the three children are Dinesh and his two sisters, so he has no brother. Both are needed.

Surface area = 4πr² = 4 × 22/7 × 1.5 × 1.5 = 4 × 22/7 × 2.25 = 198/7 sq cm.

'Rhino' means nose: a rhinoscope is used to examine the nasal passages.

Let each part be d km. Time = d/10 + d/20 + d/6 = d(6 + 3 + 10)/60 = 19d/60 hours = 19 minutes, so d = 1 and the total distance = 3 km.

The Wildlife Institute of India, an autonomous institute of the Environment Ministry set up in 1982, is in Dehradun, Uttarakhand.

The numbers are 3 × 7 = 21 and 8 × 7 = 56. LCM = 7 × 3 × 8 = 168.

Option 1: 8 × 8 + 8 ÷ 8 − 8 = 64 + 1 − 8 = 57, which is correct. The other options do not balance.

Under Article 326 and the Representation of the People Act, a person declared of unsound mind by a competent court is disqualified from registering as a voter.

Cotton grows best in the moisture-retaining black (regur) soil of the Deccan plateau – Maharashtra, Gujarat and Madhya Pradesh – often called 'black cotton soil'.

Iron, nickel and steel are ferromagnetic and are attracted by magnets. Bronze, an alloy of copper and tin, is not.

Belgian priest-physicist Georges Lemaître proposed in 1927–1931 that the universe expanded from a 'primeval atom' – the basis of the Big Bang theory.

In ABSENT → BDVISZ the letters move +1, +2, +3, +4, +5, +6. Applying this to SCHOOL: S+1 = T, C+2 = E, H+3 = K, O+4 = S, O+5 = T, L+6 = R → TEKSTR.

With false weights he receives 1210 g when buying 1 kg and gives only 790 g when selling 1 kg. His money grows by a factor of 1210/790 ≈ 1.5316, a gain of about 53.16%.

Two alternating series: A, C, E (+2) and Z, X, ? (−2). The next letter is V.

Each group is followed by its reverse: AB, BA; ABC, CBA; ABCD, DCBA.

Linux, created by Linus Torvalds in 1991, is an open-source operating system (kernel).

The National Rail Museum, opened in 1977, is at Chanakyapuri in New Delhi.

All locks are books and no book is coloured, so no lock is coloured (II follows). 'All books are locks' is the converse of a universal statement and does not follow.

3108 ÷ 259 = 12 (259 × 12 = 3108). Then 12 − 10 = 2.

Digital India's three vision areas are Digital Infrastructure as a Core Utility to Every Citizen, Governance and Services on Demand, and Digital Empowerment of Citizens. Documentaries are not one of them.

CI = 3000 × (1.05² − 1) = 3000 × 0.1025 = Rs 307.50.

4 appears twice; every other value appears once. The mode is 4.

Quarterly compounding at 20% a year means 5% per quarter, and 6 months = 2 quarters. Amount = 13500 × 1.05² = 13500 × 1.1025 = Rs 14,883.75.

The argument claims chocolate has health benefits like leafy vegetables. D (chocolate has a fat that raises bad cholesterol) undermines that. A supports it, B is a confused claim, and C is about vegetables only. Only D weakens it.