RRB NTPC CBT 1 2016: উত্তরসহ প্রশ্ন

'you' appears in all three sentences and 'ne' in all three codes, so you = ne. 'are' is in the first two, and 'se' in both, so are = se; that leaves how = kl. In 'you were here' = 'ke ne go', 'here' is ke or go; the only option built from kl, ne and one of these is 'kl ke ne', so how you here = kl ke ne.

Heat travels by conduction, convection and radiation (and diffusion of particles also carries heat). Reflection is the bouncing back of waves such as light from a surface; it is not a mode of heat transfer.

International Women's Day is celebrated on 8 March every year to honour women's achievements and promote gender equality. The UN began observing it in 1975.

With ÷ = − the expression becomes 186 ÷ 31 = 36 − 30, i.e. 6 = 6, which balances. The other orders do not give a true equation.

In similar triangles corresponding sides are in the same ratio. XY/PQ = 18/9 = 2, so YZ = 2 × QR = 2 × 6 = 12 cm.

Gelatin is used as a stabiliser in ice cream: it stops large ice crystals forming and keeps the texture smooth and creamy. Sugar, milk and strawberry are ingredients, not stabilisers.

The main ingredient of a sweetened soft drink, by far, is carbonated water (water with dissolved carbon dioxide), making up about 90% of the drink. Sugar, flavourings, phosphoric acid and caffeine are added in small amounts.

Compounded half-yearly at 20% p.a., the rate is 10% per half-year for 4 half-years. Amount = 10000 × 1.1⁴ = 10000 × 1.4641 = Rs 14,641.

Pakistan's Urdu film industry is called Lollywood, after Lahore, where it is based. Kollywood is the Tamil film industry and Mollywood the Malayalam one.

Coefficient of variation = SD/mean × 100 = 4.5/18 × 100 = 25%.

a³ + b³ + c³ − 3abc = 0 gives a + b + c = 0 (the usual case), so a³ + b³ + c³ = 3abc and a³ + b³ = 3abc − c³. Then a²/bc + b²/ac − 3 = (a³ + b³)/abc − 3 = (3abc − c³)/abc − 3 = −c³/abc = −c²/ab.

The woman's brother's only son is my wife's brother, so the woman's brother is my wife's father, i.e. my father-in-law. The woman is therefore my father-in-law's sister.

Four Indian states border Myanmar: Arunachal Pradesh, Nagaland, Manipur and Mizoram. Assam does not touch Myanmar.

A Geographical Indication (GI) tag is given to products that come from a specific place and owe their qualities or reputation to that origin, such as Darjeeling tea, Mysore silk or Banarasi sarees.

In March 2016 the Election Commission announced assembly elections for April–May 2016 in five places: Assam, West Bengal, Tamil Nadu, Kerala and Puducherry.

20 people with twice the efficiency equal 40 normal people, who finish in 5 days: 40 × 5 = 200 person-days. So 10 normal people need 200/10 = 20 days, i.e. X = 20.

Efficiency is inversely proportional to time. P : Q = 1/60 : 1/50 = 50 : 60 = 5 : 6.

The string is the hypotenuse of a right triangle whose height is 50 m. sin θ = 50/100 = 1/2, so θ = 30°.

Retinol is the main form of vitamin A, found in animal foods such as milk, eggs and liver. It is essential for vision (especially in dim light), skin and immunity.

The lady's father is Rahul's father's father, i.e. Rahul's grandfather. So the lady is the sister of Rahul's father, Rahul's paternal aunt.

Veteran actor-director Manoj Kumar, known for patriotic films such as Upkar and Purab aur Paschim, received the 47th Dadasaheb Phalke Award for 2015, India's highest award in cinema.

An informal gathering is casual and unplanned. Toppers meeting spontaneously to congratulate one another right after results come out fits best. A monthly salary-day celebration and a wedding reception are planned, and the Wagah border ceremony is a formal, organised event.

Sleep apnoea is a disorder in which breathing repeatedly stops and starts during sleep, often because the airway is blocked. Loud snoring is its most common sign.

At sea-level pressure, water boils at 100 °C, which equals 212 °F (100 × 9/5 + 32).

Circumvent and bypass are synonyms (both mean to go round an obstacle). The synonym of comprehensible is understandable.

Two consecutive odd numbers are n and n + 2. Since √399 ≈ 20, try 19 and 21: 19 × 21 = 399. So the lower number is 19.

b = 2c/3 and c = 2d/3, so b = (2/3) × (2d/3) = 4d/9. The ratio b/d = 4/9.

Windows 10, released by Microsoft in 2015, is an operating system: it manages the computer's hardware and runs other programs. Browsers and utilities are applications that run on it.

Distillation is a common desalination method: seawater is boiled and the steam condensed into fresh water, leaving the salt behind. Reverse osmosis is the other main method. Filtration cannot remove dissolved salt.

Area 2 total = 1700 + 3000 + 3500 + 4000 = 12,200 and Area 3 total = 2300 + 4000 + 4500 + 3500 = 14,300. So Area 2 has 14,300 − 12,200 = 2,100 fewer fans.

SR's total = 1500 + 4000 + 3500 + 2500 = 11,500 and MSD's total = 3000 + 3000 + 4000 + 3100 = 13,100. The difference is 1,600.

Totals: VK 2500 + 1700 + 2300 + 5000 = 11,500; MSD 13,100; RD 1500 + 3500 + 4500 + 5200 = 14,700; SR 11,500. RD has the most fans.

An echocardiogram uses ultrasound to image the heart, and Doppler echocardiography uses the Doppler effect (the change in frequency of sound reflected from moving blood) to measure the speed and direction of blood flow through the heart.

The statements say compulsive online shopping is common among youngsters, as seen from those who seek counselling. 'Common' does not mean all youngsters are addicted (I fails), and only some of them seek counselling, not all (II fails).

The mixture has 20 litres of milk and 5 of water. For a ratio of 16 : 1 with 5 litres of water, milk must be 16 × 5 = 80 litres. So 80 − 20 = 60 litres of milk must be added.

World Wetlands Day is observed on 2 February, the anniversary of the Ramsar Convention on Wetlands, signed on 2 February 1971 in Ramsar, Iran.

Night blindness is a defect of sight; similarly, stuttering is a defect of speech. Talking, speaking and lecturing are normal speech, not defects.

The 2015 Davis Cup final between Belgium and Great Britain was held in Ghent, Belgium, in November 2015. Great Britain, led by Andy Murray, won 3–1 for its first title since 1936.

The odd natural numbers below 83 are 1, 3, 5, …, 81, which is 41 numbers. The sum of the first n odd numbers is n², so the sum = 41² = 1,681.

The Windows Start menu is a software menu: a set of options and commands for opening programs, files, settings and shutting down. It is not hardware or a network feature.

With ÷ → ×, + → −, × → + and − → ÷, the expression 24 + 48 − 12 × 4 ÷ 2 becomes 24 − 48 ÷ 12 + 4 × 2. Division and multiplication first: 4 and 8. Then 24 − 4 + 8 = 28.

An avalanche is a mass of ice and snow rushing down a mountain; a volcano throws out lava (molten rock). The pair links an event with the material it releases.

Homogenisation forces milk through tiny openings under high pressure, breaking fat globules into very small droplets that stay evenly spread instead of rising as cream. Pasteurisation is heating to kill germs.

The order of the first Mughal emperors is Babur, Humayun, Akbar and Jahangir. So Akbar (reigned 1556–1605) was the third Mughal emperor.

Velocity is speed in a given direction, so it changes when speed or direction changes (that is, when there is acceleration). A speedometer only displays speed; the car's velocity does not depend on the instrument.

The Colosseum (Flavian Amphitheatre), completed in 80 AD under Emperor Titus, is in the centre of Rome, Italy. It held about 50,000 spectators for gladiator contests and public shows.

After successive discounts of 30%, 25% and 15%, the price is 0.70 × 0.75 × 0.85 = 0.44625 of the original. The single equivalent discount = 1 − 0.44625 = 0.55375 ≈ 55.38%.

In March 2016 the National Green Tribunal ordered the Art of Living Foundation to pay an initial Rs 5 crore as environmental compensation for damage to the Yamuna floodplains caused by its World Culture Festival in Delhi.

The Manusmriti (Laws of Manu), an ancient Hindu legal text on duties, law and conduct, was composed in Sanskrit, probably between the 2nd century BC and 3rd century AD.

Each term uses alternate letters: F H J, K M O, P R T. Each new term starts 5 letters after the previous start (F, K, P, U), so the next is U W Y.

India won the 2016 Asia Cup (played in T20 format in Bangladesh) by beating Bangladesh by 8 wickets in the final at Mirpur on 6 March 2016.

The Kakori train robbery of 9 August 1925 was carried out by revolutionaries of the Hindustan Republican Association, including Ram Prasad Bismil, Ashfaqulla Khan and Rajendra Lahiri, to fund their movement against British rule.

Total of 20 observations = 20 × 19 = 380. Total of 21 observations = 21 × 20 = 420. The 21st observation = 420 − 380 = 40.

Golconda began as a mud fort of the Kakatiyas, but it was built up into the great granite fort seen today by the Qutb Shahi dynasty, who made it their capital from 1518 until the Mughal conquest in 1687.

The Government of India Act 1935 abolished dyarchy in the provinces and introduced provincial autonomy, under which elected Indian ministers ran provincial governments. Elections under it were held in 1937.

Bill Gates topped the Forbes 2016 list of the world's billionaires with a net worth of about $75 billion, ahead of Amancio Ortega and Warren Buffett.

60 workers × 7 days = 420 worker-days stitch 120 m, i.e. 2/7 m per worker-day. 70 workers × 5 days = 350 worker-days stitch 350 × 2/7 = 100 m.

An echocardiogram (ultrasound of the heart) shows the heart chambers, valves and pumping action in real time, so it best reveals how the heart is functioning. An ECG records only its electrical activity, a stethoscope just its sounds, and a lipid profile is a blood test for cholesterol.

(a + b)² + (a − b)² = 2(a² + b²) = 2 × 60 = 120.

K's father's mother is G's sister, so G is the maternal uncle or aunt of K's father. S, G's daughter, is therefore the cousin sister of K's father.

The cable is the hypotenuse of a right triangle making 60° with the ground. Height = 130 × sin 60° = 130 × 0.866 ≈ 112.58 m.

Halley's Comet returns roughly every 76 years (about 75–79). It was last seen in 1986 and will next appear in 2061.

Subtract the remainders: the number divides 1580 − 8 = 1572 and 3800 − 1 = 3799 exactly. By the Euclidean algorithm, 3799 = 2 × 1572 + 655, 1572 = 2 × 655 + 262, 655 = 2 × 262 + 131 and 262 = 2 × 131, so HCF = 131.

Drinking plenty of water dilutes the urine and helps prevent kidney stones, so it is not a cause. Diabetes, oxalate-rich foods such as nuts and spinach, and other stone-forming foods raise the risk.

With angles in the ratio 2 : 3 : 5 (36°, 54°, 90°), the greatest to the smallest is 5 : 2.

Article 112 requires the President to have the 'annual financial statement' of estimated receipts and expenditure laid before Parliament each year. This statement is popularly called the Union Budget.

Bus and rail together cover 4/9 + 5/18 = 8/18 + 5/18 = 13/18 of the journey, leaving 5/18 on foot. So 5/18 of the total = 10 km, and the total = 10 × 18/5 = 36 km.

a³ + b³ + c³ − 3abc = (a + b + c)(a² + b² + c² − ab − bc − ca), and the denominator is −(a² + b² + c² − ab − bc − ca). So the expression = −(a + b + c) = −(5 + 4 + 8) = −17.

Total age of 19 members = 19 × 24 = 456 years. With the faculty the average is 24 years 4 months = 24⅓ years for 20 people, a total of 486⅔. The faculty's age = 486⅔ − 456 = 30⅔ years = 30 years 8 months.

A judge presides over proceedings in a courtroom; a referee officiates and enforces the rules of a game in a stadium.

Maria Sharapova tested positive for meldonium at the 2016 Australian Open and was provisionally suspended in March 2016. She later served a 15-month ban.

'Only nuthatch' = 75 − (15 + 10 + 12 + 15 + 13 + 5) = 5. Sunbird watchers = 15 + 12 + 13 = 40 and flycatcher watchers = 10 + 5 = 15. The difference = 25.

Birders wanting only one bird = only sunbird (15) + only flycatcher (10) + only bee-eater (15) + only nuthatch (75 − 70 = 5) = 45.

Nuthatch watchers = 12 (with sunbird) + 5 (with flycatcher) + 5 (only) = 22. Bee-eater watchers = 15 (only) + 13 (with sunbird) = 28. Ratio = 22/28 = 11/14.

The series alternates two patterns. Odd terms 9, 16, 36, 81 are squares of 3, 4, 6, 9. Even terms 4, 6, 9, ? increase by 2, 3, then 4, so the next is 9 + 4 = 13.

Charles Wilkins's English translation of the Bhagavad Gita, the first direct English translation from Sanskrit, was published in London in 1785 with the support of Warren Hastings.

Let x be lent at 10% for 5 years and (1000 − x) at 5% for 10 years. Equal interest: x × 10 × 5 = (1000 − x) × 5 × 10, so x = 1000 − x and x = 500. The sum lent at 5% is Rs 500.

'bad' is in all three sentences and 9 in all three codes, so bad = 9. 'is' is in the second and third, sharing the digit 1, so is = 1. In 'bad is good' = 419, that leaves good = 4.

An online 'demo' is typically a recorded, non-interactive presentation that shows how a product or software works; the viewer watches rather than operates it. The official key marks it as non-interactive.

'you' is in the first two sentences, which share the digit 3, so you = 3. 'home' is in the second and third, which share 7, so home = 7. In 'you come home' = 783, that leaves come = 8.

Association football is called soccer, especially in the USA, Canada and Australia, where 'football' means other sports. The word comes from 'association'.

OMESU = MOUSE, ROTINOM = MONITOR and RETNIRP = PRINTER are computer devices. RETIAW = WAITER is a person who serves food, so it is different.

Each correct pair names an element found in the thing: nitrogen in air, hydrogen in water, sulphur in matchstick heads. Coins are not made of uranium (they use metals such as copper, nickel and steel), so Uranium : Coins is the odd pair.

Profit is greatest when a shirt costs the least (Rs 400) and sells for the most (Rs 650): Rs 250 per shirt. For 10 shirts the maximum profit = 10 × 250 = Rs 2,500.

The zodiac is divided into 12 signs (Aries to Pisces), each covering 30° of the ecliptic, the Sun's apparent yearly path across the sky.

Take CP = 100, so the marked price = 125. To sell at no profit or loss she sells at 100, a discount of 25 on 125 = 25/125 × 100 = 20%.

Variance is the square of the standard deviation: 10² = 100.

Copper is used for electric wires because it is an excellent conductor of electricity (second only to silver), as well as cheap, ductile and durable. So both are true and R explains A.

Mohan is twice as fast as Sohan, so he covers the same distance in half the time: 42/2 = 21 minutes.

Let the angle be x. Then x = 60 + (90 − x)/5, so 5x = 300 + 90 − x, 6x = 390 and x = 65°. Its complement is 25°, so the smaller of the two angles is 25°.

Violet–Brown–White must stand together, and none of them is in the centre or allows White at an end; the only fit is positions 1–3. Black–Purple must be together with Purple not at the end, and Blue must avoid places 6 and 7, so Blue is 4th, Black 5th, Purple 6th and Indigo 7th. The row is Violet, Brown, White, Blue, Black, Purple, Indigo, so the ends are Indigo and Violet.

In the arrangement Violet, Brown, White, Blue, Black, Purple, Indigo, the centre (4th) bottle is Blue.

In the row Violet, Brown, White, Blue, Black, Purple, Indigo, the black bottle (5th) is immediately to the right of the blue one (4th). The other statements do not match the arrangement.

Demand and supply come from buyers and sellers, so buyers and sellers determine prices; I follows. Prices rise or fall with the number of buyers and sellers, i.e. they are discovered by the market; II follows too.

This is an arithmetic series with first term 6, common difference 5 and last term 71, so it has (71 − 6)/5 + 1 = 14 terms. Sum = 14 × (6 + 71)/2 = 14 × 38.5 = 539.

American astronomer Clyde Tombaugh discovered Pluto on 18 February 1930 at the Lowell Observatory in Arizona, by comparing photographic plates of the night sky. Pluto was reclassified as a dwarf planet in 2006.

Saying the real impact of the water crisis will be felt in two years assumes that water levels are already falling, so assumption I is implicit. Nothing in the statement refers to maintaining water bodies, so II is not implicit.

Let the numbers be 3k, 5k and 10k, whose LCM is 30k = 630, so k = 21. The numbers are 63, 105 and 210, and their HCF = 21.

Three years ago Maya and Shika were 5k and 9k, so now they are 5k + 3 and 9k + 3. Five years from now (5k + 8)/(9k + 8) = 3/5, so 25k + 40 = 27k + 24 and k = 8. Maya's present age = 5 × 8 + 3 = 43.

'god' is in all three sentences and 'fa' in all three codes, so god = fa. 'is' is in the first two, which share 'ge' besides 'fa', so is = ge.