RRB NTPC CBT 2 2017: જવાબો સાથે પ્રશ્નો

Each group takes letters at positions n+1, n+3, n+2, n: BDCA (2,4,3,1), FHGE (6,8,7,5), JLKI (10,12,11,9). The next starts 4 letters later: N, P, O, M (14,16,15,13) = NPOM.

TEMPORARY → RPMOAETRY takes letters 6, 4, 3, 5, 7, 2, 1, 8, 9. Applying this to PERMANENT (P1 E2 R3 M4 A5 N6 E7 N8 T9) gives N, M, R, A, E, E, P, N, T = NMRAEEPNT.

A thermometer measures temperature; a clock measures time.

The Sundarbans, in the Ganga–Brahmaputra delta of India and Bangladesh, is the world's largest mangrove forest and a UNESCO World Heritage Site.

Twice the number must be a multiple of LCM(4, 6, 9, 12, 14) = 252. The least such number is 252/2 = 126.

II gives T < Q < R. With I (T < P < S), T is shorter than P, Q, R and also S (through P), so T is the shortest. With III (R < S, Q < P) as well, T < Q < P and T < Q < R < S, so again T is the shortest. II with either I or III is sufficient.

Indian Railways' International Tourist Bureaus, which help foreign tourists book tickets, operated at major stations such as Chennai, Secunderabad and Bengaluru, but not at Thiruvananthapuram (as per the official key).

Tejas is India's indigenous Light Combat Aircraft, developed by ADA and HAL. Chetak, Rudra and Dhruv are helicopters.

Data mining is the process of examining large existing databases to discover new, useful patterns and information.

18 × 16 ÷ 12 − 11 + 13 = 288 ÷ 12 − 11 + 13 = 24 − 11 + 13 = 26.

Distance = 50 × 8 = 400 km. To cover it in 5 hours the speed must be 80 km/h, an increase of 30 km/h.

In 6 hours X covers 120 km. Y gains 50 − 20 = 30 km/h, so it catches up in 4 hours, having travelled 50 × 4 = 200 km.

A fixed Rs 2 profit is the largest percentage on the smallest cost: 2/8 = 25% for item (iii), compared with 18%, 22% and 20%.

The Tyndall effect is the scattering of light by colloidal particles, which makes a beam of light visible (as in sunlight through a dusty room).

The ratio 1 : 2/3 = 3 : 2, so the numbers are 3k and 2k with LCM 6k = 48. Hence k = 8, the numbers are 24 and 16, and their sum is 40.

2011 + 2013: W = 130 + 86 = 216, X = 134 + 112 = 246, Y = 114 + 76 = 190, Z = 108 + 80 = 188. Z is the lowest.

In 2011: W = 130, X = 134, Y = 114, Z = 108. Division X sold the most.

Y in 2012 + 2013 = 164 + 76 = 240; Z = 96 + 80 = 176. Ratio 240 : 176 = 15 : 11.

W's average = (100 + 130 + 140 + 86)/4 = 456/4 = 114.

Sarda is married to Arjun, and Arun is Sarda's son, so his father is Arjun. Sonali is also Arjun's daughter, so Arun is Sonali's brother.

A 2% higher rate for 5 years earns 10% of the principal more. 10% of P = 300, so P = Rs 3000.

An author is the creative head of a book; a director is the creative head of a movie.

If P takes t days, Q takes 4t, and 4t − t = 27 gives t = 9. So P takes 9 and Q 36 days. Together: 1/9 + 1/36 = 5/36 per day, so 36/5 = 7 1/5 days.

The diagonal is 6 cm. Area of a square = diagonal²/2 = 36/2 = 18 sq cm.

Shiv Chawrasia, Jason Day and Anirban Lahiri are professional golfers. Michael Bevan is a former Australian cricketer.

If SP = 100, CP = 35 and profit = 65. Profit % on cost = 65/35 × 100 ≈ 185.71%.

Sectors are classified as public or private by ownership: the government owns public-sector enterprises and private individuals or companies own private-sector ones.

Prasar Bharati, India's public broadcaster set up in 1997, comprises All India Radio and Doordarshan. BSNL is a separate telecom company.

'ObamaCare' is the US Patient Protection and Affordable Care Act (2010), which aimed to make health insurance and medical care affordable.

Car P covers 66 × 11 = 726 km. Car Q covers 726 + 242 = 968 km in 11 hours, an average of 88 km/h.

YouthSat is an Indo-Russian student satellite launched by ISRO on PSLV-C16 in 2011 to study the upper atmosphere and the Sun.

A.R. Rahman received Japan's Fukuoka Prize 2016 (Arts and Culture) for his contribution to music that fuses South Asian traditions with world music.

Mean = (130 + 90 + 25 + 77 + 250 + 100)/6 = 672/6 = 112.

Lifestyle diseases are more common in cities despite better healthcare (A is true). Pollution, poor garbage disposal and fast food explain this (R is true and explains A).

Cross-multiplying: 7(a + 4) = 5(a − 2), so 7a + 28 = 5a − 10, 2a = −38 and a = −19.

The statement promotes nutritious food; it does not predict doctors losing their jobs (I), and II contradicts the statement. Neither follows.

Two series alternate: 4, 8, 12, 16, 20 (multiples of 4) and 5, 10, 15, 20, 25 (multiples of 5). The missing term is 20.

The fourth proportional x satisfies 15 : 12 = 20 : x, so x = 12 × 20/15 = 16.

Bishweshwar Nandi, coach of gymnast Dipa Karmakar, received the Dronacharya Award in 2016.

The words are BIOLOGY, TRAVEL, CHEMISTRY and PHYSICS. Biology, chemistry and physics are sciences; TRAVEL is different.

M is the father of C, and B is C's husband, so B is M's son-in-law.

Potential difference (voltage) between two points is the work done in moving a unit charge between them: V = W/Q.

The Rann Utsav is a winter festival held on the white salt desert of the Rann of Kutch in Gujarat.

30 drink only coffee and 15 drink all three, so the first group has 15 more people.

Tea drinkers = 40 + 25 + 20 + 15 = 100. Coffee drinkers = 30 + 25 + 15 = 70. Difference = 30.

350 g is 1.4 times 250 g, so cashew = 20 × 1.4 = 28 g and almonds = 30 × 1.4 = 42 g.

I: n − 0.25n = 60, so n = 80 and 40% = 32. II only says 0.2n is even. III (5% of 2n = n/10) is true for every number. Only I is sufficient.

Heterotrophic nutrition includes parasitic, holozoic and saprotrophic modes. Organisms that make their own food are autotrophic; 'automatic' is not a mode of heterotrophic nutrition.

The groups are A, BB, D, EEE, H, IIII, M…: a single letter, then a repeated letter (repeated 2, 3, 4 times), with jumps of +1, +2, +1, +3, +1, +4 between groups. After the third I comes a fourth I, then M.

ICAR, the apex body for agricultural research and education, is headquartered at Krishi Bhavan, New Delhi.

A reaction that releases heat is exothermic (e.g. burning). One that absorbs heat is endothermic.

Peristalsis is the wave-like contraction and relaxation of the walls of the food pipe (oesophagus) and intestines that pushes food along.

Mining, farming activities and burning fossil fuels release pollutants into the air. Acid rain is a result of air pollution (sulphur and nitrogen oxides), not a cause.

The Supreme Court of India was inaugurated on 28 January 1950, two days after the Constitution came into force.

In photosynthesis, light energy splits water molecules into oxygen, protons and electrons. This is the photolysis of water.

One year's interest = 1184 − 1120 = Rs 64, which is 8% of P. So P = 64/0.08 = Rs 800.

Malthus, Ricardo and Keynes were economists. Niels Bohr was a physicist known for his model of the atom.

CP = 2500/1.25 = Rs 2000, so the profit = 2500 − 2000 = Rs 500.

The work = 15 × 20 = 300 man-days; double the work = 600. With 10 men it takes 60 days.

Mobile phone sales have grown hugely (A is true), but the official key treats the claim that e-commerce craze drives those sales as false. Mobiles are bought mainly for communication and data.

Dr. S.C. Jamir, a former Chief Minister of Nagaland, was sworn in as Governor of Odisha on 21 March 2013.

Y is a child of Z (X's sibling) but not a son, so Y is a daughter. K is Z's wife, so Y is K's daughter.

A depression is a severe, prolonged recession, like the Great Depression of the 1930s.

Silicon is the most widely used semiconductor, the base material for chips, transistors and solar cells.

80 appears three times, more than any other value, so the mode is 80.

D is the 4th letter and 17 = 4² + 1. F is the 6th letter, so 6² + 1 = 37.

2/4 = 0.5 and 0.6 are the limits. 21/40 = 0.525 lies between them; 11/25 = 0.44, 3/4 = 0.75 and 11/4 = 2.75 do not.

The Sahitya Akademi, India's National Academy of Letters set up in 1954, promotes literature in Indian languages.

For similar triangles, corresponding medians are in the ratio of the sides, i.e. √121 : √64 = 11 : 8. So the second median = 12.1 × 8/11 = 8.8 m.

UNESCO's Man and Biosphere Programme describes biosphere reserves as 'learning sites for sustainable development' that combine conservation with sustainable use.

Kud is a ritual folk dance of the Jammu region of Jammu & Kashmir, performed at night in honour of the local deity Lok Devta.

0.0004321 = 43.21 × 10⁻⁵, so 1/0.0004321 = (1/43.21) × 10⁵ = 0.02314 × 100000 = 2314.

Cost per kg of the mixture = (4 × 25 + 6 × 35)/10 = Rs 31. Profit = 6/31 × 100 ≈ 19.4%, about 20%.

60% of 80 = 48, and 7/8 of 48 = 42.

Desert Circuit is IRCTC's semi-luxury tourist train in Rajasthan. Royal Rajasthan on Wheels, Maharajas' Express and Deccan Odyssey are full-luxury trains.

3 × 0.3 × 0.03 × 0.003 = 3⁴ × 10⁻⁶ = 81 × 10⁻⁶.

Black soils, formed from Deccan basalt and ideal for cotton, are known as regur.

Circumference = πd = 22/7 × 84 = 264 cm. Revolutions = 79200/264 = 300.

GDP is the market value of all final goods and services produced within a country in a given period. Intermediate goods are excluded to avoid double counting.

The Non-Cooperation Movement (1920–22) called for boycotting titles, services and foreign goods but was strictly non-violent. Gandhi withdrew it after the violence at Chauri Chaura.

Replacing the letters: 48 ÷ 8 + 7 × 2 − 21 = 6 + 14 − 21 = −1.

12 men = 24 boys, so 1 man = 2 boys. The work = 12 × 20 = 240 man-days. 24 men + 12 boys = 30 men, so they take 240/30 = 8 days.

The Temple of the Sacred Tooth Relic (Sri Dalada Maligawa), housing a tooth relic of the Buddha, is in Kandy, Sri Lanka.

Let girls = g and boys = 2g. After the stop, 2g − 15 = g + 10, so g = 25. There were 50 boys at the start.

After swapping − and ÷: 38 ÷ 2 + 1 × 6 − 6 = 19 + 6 − 6 = 19.

Males: Y's husband, J, K, P, P's two sons, Q's husband and Q's two sons = 9. Females: Y, J's wife (nurse), K's wife (teacher), P's wife and Q = 5. Ratio 9 : 5.

J, a teacher, is married to a nurse, so Nurse – Teacher is a couple. The other couples are Housewife – Inspector (Y and her husband) and Banker – Teacher (K and his wife).

Q is K's daughter and K is Y's son, so Q's grandmother is Y, who is a housewife.

Mangalyaan (Mars Orbiter Mission, 2013) was India's first interplanetary mission. SARAL, Jugnu and ANUSAT are Earth-orbiting satellites.

In MS Excel a file is called a workbook, which contains one or more worksheets.

cos θ = 4/5 gives a 3–4–5 triangle: sec θ = 5/4 and tan θ = 3/4. Sum = 8/4 = 2.

Computer literacy means being able to use a computer for everyday needs – running applications, using the internet and so on. Programming or creating antivirus software is not required.

Each letter of HIJACK moves 13 places (H→U, I→V, J→W, A→N, C→P, K→X). Applying +13 to SPOON gives F, C, B, B, A = FCBBA.

In Hind Swaraj Gandhi argued that 'the English have not taken India; we have given it to them' – British rule survived because of Indian cooperation, which is why non-cooperation could end it.

Machli (T-16), the 'Queen of Ranthambore' and once the world's most photographed tigress, died in August 2016 at about 19 years old.

Dhamu − Shamu = 9 − 5 = 4 parts = Rs 120, so 1 part = 30. Ramu gets 7 × 30 = Rs 210.

Parliament – the President, Lok Sabha and Rajya Sabha – is India's supreme legislative body.

Ctrl + C copies the selected text and Ctrl + V pastes it. Ctrl + X cuts and Ctrl + Z undoes.

Old salary × 1.30 = 910, so the old salary = Rs 700.

An advertisement's promise does not prove that every student succeeded, nor that no other tuition is as good. Neither conclusion follows.

Ustad Amjad Ali Khan is a renowned sarod maestro of the Senia Bangash gharana, awarded the Padma Vibhushan.

Under the flexi-fare system introduced in 2016 for Rajdhani, Duronto and Shatabdi trains, the base fare rises by 10% with every 10% of seats sold, up to a cap.

Kabaddi is the state game of Tamil Nadu, Telangana, Punjab, Andhra Pradesh and Bihar. Rajasthan's state game is basketball.

The Netaji Subhas National Institute of Sports (NIS), Asia's largest sports institute, is in the Old Moti Bagh Palace at Patiala, Punjab.

She reads 15/25 = 0.6 pages a minute, so in 45 minutes she reads 27 pages.

The code is the sum of letter positions: MGE = 13 + 7 + 5 = 25. LJF = 12 + 10 + 6 = 28.

8⅓% = 1/12, so each year multiplies by 13/12. 2197/1728 = 13³/12³, so the time is 3 years.

SI = 37000 × 4.5 × 2/100 = Rs 3330. Amount = 37000 + 3330 = Rs 40,330.

ICR (Intelligent Character Recognition) is an advanced form of OCR that recognises handwritten characters.

Under Article 100(3), the quorum for a sitting of either House is one-tenth of its total membership.

The letters are at positions 1, 4, 9, ?, 25 – perfect squares. The missing one is 16 = P.

World Sparrow Day, started in 2010 by the Nature Forever Society, raises awareness about the declining house sparrow and its conservation.

√(2 × 3) = √6 is not a perfect square, so it is irrational. √9 = 3, 2/3 and 11/8 are rational.

A bird flies in the sky, and in this code 'bird' is called 'elephant'.

Each term is n³ − 1: 1 − 1 = 0, 8 − 1 = 7, 27 − 1 = 26, 64 − 1 = 63, 125 − 1 = 124. Next: 216 − 1 = 215.

The Fountain of Wealth, once listed as the world's largest fountain, is at Suntec City in Singapore.

LCM + HCF = 115 × HCF = 2300, so HCF = 20 and LCM = 2280. The other number = HCF × LCM / 380 = 20 × 2280/380 = 120.

Ozone (O₃) is made of three oxygen atoms; ordinary oxygen (O₂) has two.

Crocodiles, turtles and frogs can live both in water and on land. The sea horse is a fish that lives only in water, so it is different.

Prey loss, cattle grazing and habitat fragmentation threaten tigers. Connecting wildlife corridors helps tigers by linking separated habitats.