RRB NTPC CBT 1 2016: questions with answers

Leukaemia is a cancer of the blood-forming tissues in which abnormal white blood cells multiply uncontrollably in the bone marrow.

0.00000625/25 = 0.00000025, and √0.00000025 = 0.0005 (since √625 = 25, √0.25 = 0.5 and the decimal places halve).

75 pencils at Rs 2 cost Rs 150, so 30 pens cost 390 − 150 = Rs 240, an average of Rs 8 per pen.

Region b is inside the Football and Basketball circles but outside the Cricket circle.

Region a is the part of the Football circle that lies outside both other circles.

Region c, at the centre, is common to all three circles.

Hemant's father's wife is his mother, and her daughter is Hemant's sister. The two brothers of that sister are Hemant and his brother, so the younger of the two is Hemant's brother.

A scanner reads printed images into the computer, so it is an input device. Plotters, speakers and printers are output devices.

Explorer 1, launched on 31 January 1958, was the first US satellite; it discovered the Van Allen radiation belts.

Let the tank fill in t minutes, with A open for t − 4. (t − 4)/12 + t/16 = 1 gives 4t − 16 + 3t = 48, so t = 64/7 ≈ 9 minutes 8 seconds.

The Dhamekh Stupa at Sarnath marks the spot where the Buddha gave his first sermon (Dharmachakra Pravartana) after enlightenment.

In figure X the bottom-left quarter is the top-left quarter flipped upside down, and the bottom-right quarter is the bottom-left one mirrored left to right. So the missing top-right quarter is the mirror image of the top-left quarter, which is option 3.

From the clues the order from left to right is Samsung, Hitachi, Godrej, Carrier, Videocon, LG, Whirlpool. LG is immediately left of Whirlpool.

In the order Samsung, Hitachi, Godrej, Carrier, Videocon, LG, Whirlpool, the air conditioners to the right of Carrier are Videocon, LG and Whirlpool.

In the order Samsung, Hitachi, Godrej, Carrier, Videocon, LG, Whirlpool, Godrej is immediately to the left of Carrier.

In 1893 Amir Abdur Rahman Khan of Afghanistan and Sir Mortimer Durand of British India signed the agreement creating the Durand Line.

Sea, valley and mountain are natural features. A tower is man-made, so it is the odd one.

The Ram Nandan Prasad Committee, set up after the Indra Sawhney judgment, identified the 'creamy layer' among OBCs; its 1993 report was accepted.

Persistent organochlorine pesticides such as DDT are not broken down or excreted, so they build up in organisms and concentrate up the food chain (biomagnification).

The Damodar Valley Corporation runs power stations at Durgapur, Chandrapura and Maithon. Hampi is not part of the project.

Qutb-ud-din Aibak, founder of the Delhi Sultanate (Slave dynasty), began the Qutub Minar in 1193; Iltutmish completed it.

Krishnanattam, a dance drama on the life of Krishna created by the Zamorin of Calicut in the 17th century, belongs to Kerala.

The Haryana Panchayati Raj (Amendment) Act, 2015 made matriculation (Class 10) the minimum qualification for general candidates contesting panchayat elections, with lower requirements for women and Scheduled Castes.

Amir Khusro (1253–1325), poet and musician at the Delhi Sultanate court, is traditionally credited with inventing the tabla and the sitar.

The policeman gains 15 − 10 = 5 km/h on the thief, so he closes the 400 m gap in 0.4/5 = 0.08 hours. In that time the thief runs 10 × 0.08 = 0.8 km = 800 m.

Oilzapper, a bacterial formulation that degrades oil spills and oily sludge, was developed by TERI (The Energy and Resources Institute) with IOC.

In 2016 the government released a stamp marking the centenary of the Zoological Survey of India (founded 1916), the apex body on animal taxonomy.

ICICI Bank launched India's first contactless mobile payment solution (tap-and-pay through the phone) in 2015.

The ozone layer in the stratosphere (about 15–35 km up) absorbs most of the Sun's harmful ultraviolet radiation.

√5/√2 = √2.5 ≈ 1.581 (equivalently 2.236/1.414).

The numbers are 16a and 16b with a and b co-prime and differing by 1. Of the options only 64 and 80 (16 × 4 and 16 × 5) have HCF 16 and difference 16.

1584 is 120% of the 1991 figure, so production in 1991 = 1584/1.2 = 1320 million kg.

As per the official key, Prithvi Raj Singh was selected to the board of governors of the World Water Council for 2016–18 at its 7th general assembly in Marseille.

The lungs contain several hundred million capillaries wrapped around the alveoli; the official key gives over 300 million.

From MOBILE = 713694: B 3, L 9, E 4. From TABLET = 253942: A 5, T 2. BALLET = 3 5 9 9 4 2 = 359942.

A + B = 1/12, B + C = 1/15 and A + C = 1/20 of the work per day. Adding and halving, A + B + C = 1/10, so A alone = 1/10 − 1/15 = 1/30: 30 days.

The HT-2 basic trainer, first flown in 1951, was the first indigenous aircraft designed and built by HAL.

18/27 = 2/3 ≈ 0.667.

tan 45° = 1, since sine and cosine are equal (1/√2) at 45°.

Expenses: January 5,000, February 10,000, March 15,000. Average = 30,000/3 = Rs 10,000.

The two times differ by 15 minutes: d/4 − d/5 = 1/4 hour, so d/20 = 1/4 and d = 5 km.

The Indian President can keep an ordinary bill pending indefinitely (no time limit), while the US President must act within 10 days. This indefinite 'pocket veto' is why the Indian President's pocket is called bigger.

A straight angle is 180°, half a full turn.

The father of Twinkle's mother's son is Twinkle's father, and his sister is Twinkle's aunt.

Some doors are shelves and all shelves are windows, so some doors are windows (1 follows). Nothing says no shelf is a door; in fact some are (2 fails).

Total age = 40 × 10 + 30 × 12 = 760 years for 70 students. Average = 760/70 ≈ 10.86, i.e. 10.85 among the options.

The only daughter of Preeti's father is Preeti herself, so Preeti is that person's mother.

An acid turns blue litmus red, and a base turns red litmus blue.

The first India International Science Festival was held at IIT Delhi, New Delhi, in December 2015.

B = 1/A, and for any positive A, A + 1/A ≥ 2 (equal to 2 only when A = 1). So A + B is more than one.

Going clockwise: 3, 5, 8, 13, 22, ?. The differences 2, 3, 5, 9 follow 'double the previous difference and subtract 1', so the next difference is 17 and ? = 22 + 17 = 39.

ISRO's GSLV made its first developmental flight (GSLV-D1, carrying GSAT-1) on 18 April 2001.

The official answer is 15. Pairing each number with the one opposite it gives 5 → 9 and 6 → 11, and the missing number opposite 7 is 15; no single simple rule fits every pair, so treat this one as the official answer.

2 hours = 7200 seconds, and 18/7200 = 1/400.

SI = P × 5 × 6/100 = 0.3P = 615, so P = Rs 2,050.

Having 150 classrooms per thousand against a national norm of 100 shows the state is taking adequate care (II follows). It says nothing about whether the norm itself is appropriate (I does not follow).

734² − 234² = (734 − 234)(734 + 234) = 500 × 968 = 4,84,000. So x² = 12,100 and x = 110.

Blood cells are made in the bone marrow (haematopoiesis), a function of the skeleton. Removing poisonous wastes from the blood is a function of the kidneys (with the liver doing chemical detoxification).

Anthocyanins are water-soluble flavonoid pigments that give flowers and fruits red, purple and blue colours.

Decomposition reactions need energy to break a compound apart, so they are endothermic (e.g. heating calcium carbonate). Combustion is always exothermic.

'Dreaming Big: My Journey to Connect India' (2015) is the autobiography of telecom pioneer Sam Pitroda.

4 sin θ = 3 cos θ gives tan θ = 3/4, so sin θ = 3/5 and cos θ = 4/5. sec θ × cosec θ = (5/4)(5/3) = 25/12.

STAR → TSRA swaps each pair of letters (ST → TS, AR → RA). MOON → OM NO = OMNO.

Novak Djokovic won the ATP World Tour Finals in 2012, 2013, 2014 and 2015, the first player to win it four years in a row.

Dynamite – Alfred Nobel, dynamo – Michael Faraday, electron – J. J. Thomson, proton – Rutherford: P–c, Q–b, R–a, S–d.

Burning fossil fuels, deforestation and more vehicles all raise atmospheric CO₂. Solar heaters do not emit CO₂.

Amount = 400 × (1.05)² = 400 × 1.1025 = Rs 441.

In figure X diagonally opposite quarters match: the top-right and bottom-left quarters both hold a wide band. So the missing top-left quarter must match the bottom-right one (an arc with a quarter-disc inside), which is option 4.

A LAN covers a small area over short cables, so it offers the highest data-transfer speed; MANs and WANs span larger distances at lower speeds.

By the remainder theorem put y = 2: 15(8) − 30(4) + 12(2) − 12 = 120 − 120 + 24 − 12 = 12.

Benches and boxes are both linked to autos only partly, so nothing connects benches with boxes (1 and 3 fail). Pens are benches, and some benches are autos, so 'no pen is auto' is not certain (2 fails). None follows.

India has the world's largest area under wheat (about 30 million hectares, ahead of Russia and China), although China produces more.

The diameter is the longest chord of a circle, passing through the centre.

If good health itself is a luxury there because of hunger and poor hygiene, people clearly cannot afford many luxuries (I follows). 'Good health is a gift of nature' is not stated (II does not follow).

Convex mirrors give an erect, diminished image with a wide field of view, so they are used as wing and rear-view mirrors.

India's space programme aims at satellite communication and education, remote sensing and weather forecasting, and building indigenous satellites and launch vehicles: all three.

Hard : soft, sweet : sour and pointed : blunt are opposites. Long : high are not opposites, so that pair is different.

All wires are books, so some books are wires (2). Some wallets are plates and all plates are books, so some books are wallets (3). Wires and plates need not overlap (1 fails). Only 2 and 3 follow.

Student : scholar, soldier : warrior and politician : leader are near-synonyms. Paddy : husk is a grain and its outer covering, so it is different.

CP = SP/1.2 = 84/1.2 = Rs 70.

Interest on loans is 17.5% = Rs 2.45 crore, so the total is Rs 14 crore. Advertisement + taxes + R&D = 15 + 10 + 5 = 30% = Rs 4.2 crore.

Infrastructure + transport = 20 + 12.5 = 32.5%; taxes + interest = 10 + 17.5 = 27.5%. 32.5 : 27.5 = 13 : 11.

Advertisement is 15% = Rs 2.10 crore, so 1% = Rs 0.14 crore. Transport − taxes = 12.5% − 10% = 2.5% = Rs 0.35 crore = 35 lakh.

Cost = 2000 × 0.9 × 0.85 + 70 = 1530 + 70 = Rs 1,600. Selling at Rs 2,000 gives a gain of 400/1600 = 25%.

Farhaan Behardien, Aaron Phangiso and Vernon Philander are South African cricketers. Stan Wawrinka is a Swiss tennis player.

The epidermis is the outermost layer of the skin; the dermis and hypodermis lie beneath it.

The centre number is the three top digits minus the three bottom digits (or the reverse): 915 − 364 = 551 and 789 − 543 = 246. For the third, 863 − 241 = 622.

The Indian National Army was first formed in 1942 by Captain Mohan Singh with Indian prisoners of war in Malaya; Subhas Chandra Bose revived it in 1943.

Two numbers with product 8 and sum −6 are −4 and −2, so x² − 6x + 8 = (x − 4)(x − 2).

87375 = 698 × 125 + 125 (698 × 125 = 87250), so subtracting the remainder 125 gives a multiple of 698.

Android was developed by Android Inc., bought by Google in 2005, and announced in 2007 with the Open Handset Alliance.

From HISTORY = 7326845: I 3, S 2, T 6, O 8, R 4. From CIVICS = 135312: V 5. VISITOR = 5 3 2 3 6 8 4 = 5323684.

CP of one pencil = 6/20 = Rs 0.30 and SP = 6/16 = Rs 0.375. Gain = 0.075 on 0.30 = 25%.

They ring together again after LCM(1, 2, 3) = 6 hours.

a/b = 1/3 with a = 2 gives b = 6; b/c = 1/2 gives c = 12.

SINK → ISKN swaps each pair of letters (SI → IS, NK → KN). MINT → IM TN = IMTN.

Udham Singh shot Sir Michael O'Dwyer, Lieutenant-Governor of Punjab at the time of the Jallianwala Bagh massacre, in London on 13 March 1940.

The advertisement only warns that equity carries market risk and advises consulting an expert. It does not say one should not invest (I fails), nor that an advisor can measure the risk with certainty (II fails). Neither follows.

Let the base be x, the perpendicular x + 2 and the hypotenuse x + 4. x² + (x + 2)² = (x + 4)² gives x² − 4x − 12 = 0, so x = 6 cm (a 6-8-10 triangle).

Kapil Dev, India's 1983 World Cup-winning captain from Haryana, is known as the 'Haryana Hurricane'.