RRB NTPC CBT 1 2016: questions with answers

Unscrambled, the words are LOWELY = YELLOW, THIWE = WHITE, WRONB = BROWN and IFER = FIRE. Yellow, white and brown are colours; fire is not, so IFER is different.

A mean of 16 for 5 values means their total is 5 × 16 = 80. The given four add to 18 + 16 + 22 + 13 = 69, so the missing value = 80 − 69 = 11.

Both letters move one step forward each time: first letters A, B, C, D, E and second letters N, O, P, Q, R. The next term is ER.

Mars is called the Red Planet because iron oxide (rust) in its soil and dust makes its surface look reddish. Venus is the one known as the morning and evening star.

A clear solution of calcium hydroxide, Ca(OH)₂, in water is called lime water. It turns milky when carbon dioxide is bubbled through it, because insoluble calcium carbonate forms; this is the standard test for CO₂.

A nurse works in a hospital ward; a teacher works in a class (classroom). The pair links a worker with the place where the work is done.

'Smiling Buddha' was the code name of India's first nuclear test, Pokhran-I, conducted on 18 May 1974 in Rajasthan. The 1998 tests (Pokhran-II) were called Operation Shakti.

T is at the right end (6th) and X, immediately left of T, is 5th. S is four places from X, so S is 1st. V is immediately right of Y and two places from W; the only fit among places 2–4 is W 2nd, Y 3rd, V 4th. The order is S W Y V X T, and there is exactly one car (V) between X and Y.

In the arrangement S W Y V X T worked out above, W is in the 2nd place, immediately to the right of S.

In the order S W Y V X T, the car immediately to the left of X (5th) is V (4th).

Jantar Mantar in New Delhi is an astronomical observatory built by Maharaja Sawai Jai Singh II in 1724. Its large masonry instruments were used to measure time and track the Sun, Moon and planets.

Bharat Stage (BS) Emission Standards are norms set by the Government of India to limit air pollutants from motor vehicles. They are modelled on European (Euro) norms; India moved from BS-IV directly to BS-VI in 2020.

From M > L > N and N = R, we get M > L > R. So R < L, which makes I (R > L) false, while R < M is true. Only conclusion II follows.

Adjacent sides of a rectangle and of a square meet at 90°, and the diagonals of a rhombus bisect each other at right angles. The hypotenuse of a right triangle is not perpendicular to either of the other sides (the right angle is between the two shorter sides), so C is the odd statement.

Let x men agree to do the work in 20 days: total work = 20x man-days. With 5 absent, (x − 5) men take 40 days: 40(x − 5) = 20x. So 40x − 200 = 20x, and x = 10.

The primes between 60 and 100 are 61, 67, 71, 73, 79, 83, 89 and 97, which is 8 primes.

Argument I is strong: teaching wise use helps children use the internet responsibly and stay safe. Argument II also raises a relevant point, that children learn a great deal by exploring on their own, which is a real consideration against over-directing them. The official key treats both as strong.

Washing soda (sodium carbonate decahydrate, Na₂CO₃·10H₂O) removes permanent hardness of water, is used to make sodium compounds such as borax, and is used in glass, soap and paper industries. It is not a disinfectant; drinking water is disinfected with chlorine or bleaching powder.

With y = 5: y⁴ = 625 and y² = 25, so y⁴ − y² − y = 625 − 25 − 5 = 595. Multiplying by y: 5 × 595 = 2975.

Let the numbers be a and b with a + b = 34 and a − b = 8. Adding gives 2a = 42, so a = 21 and b = 13. Their product = 21 × 13 = 273.

Numbers in the ratio 2 : 3 are 2k and 3k, with LCM 6k = 66, so k = 11. The numbers are 22 and 33, and their sum is 55.

Replacing the letters, 36 P 6 Q 7 R 8 S 11 becomes 36 ÷ 6 + 7 × 8 − 11. Division and multiplication first: 36 ÷ 6 = 6 and 7 × 8 = 56. Then 6 + 56 − 11 = 51.

A multitasking operating system runs more than one process (program) at the same time, switching the CPU between them so they appear to run together. Supporting more than one user at once is multi-user, a different feature.

The School Nursery Yojana, launched in 2015 by the Ministry of Environment, Forest and Climate Change, involves students in raising saplings in school nurseries. Its aim is to create environmental awareness and a bond with nature in young minds.

The only son of Ms. Chandra's grandfather is her father. Lakshmi's husband is Ms. Chandra's father, so Lakshmi is her mother and Ms. Chandra is Lakshmi's daughter.

Under Article 324(5), the Chief Election Commissioner can be removed only in the same way as a Supreme Court judge: on grounds of proved misbehaviour or incapacity, through a resolution passed by a special majority in both Houses of Parliament. The formal order is then issued by the President.

cos 90° = 0, cosec 90° = 1/sin 90° = 1 and cot 45° = 1. So cos²90° + cosec²90° − cot²45° = 0 + 1 − 1 = 0.

According to Census 2011, India's population density was 382 persons per sq. km (up from 325 in 2001). Bihar was the most densely populated state (1,106 per sq. km) and Arunachal Pradesh the least (17).

Father = 54, so mother = 52. The younger sister is half the mother's age = 26, and the elder sister is 4 years older = 30.

2² = 4, 3³ = 27, 4³ = 64 and 6² = 36. So 4 − 27 + 64 − 36 = 5.

The Syed Modi International badminton tournament, named after the former national champion Syed Modi, is held every year in Lucknow, Uttar Pradesh, at the Babu Banarasi Das Indoor Stadium.

IPS officer Archana Ramasundaram became the first woman to head a paramilitary (Central Armed Police) force when she was appointed Director General of the Sashastra Seema Bal (SSB) in 2016.

Khan Abdul Ghaffar Khan, the Pashtun freedom fighter who founded the non-violent Khudai Khidmatgar movement, was called 'Badshah Khan' and 'Frontier Gandhi'. He received the Bharat Ratna in 1987.

Totals from June to September: JK 4400, HP 4500, WB 4900, GA 5500, TN 4350. TN has the smallest total, so its average (4350/4 = 1087.5 mm) is the lowest.

Only GA's rainfall rises every month: 1000 → 1300 → 1500 → 1700 mm. The other states fall or fluctuate in some month.

Monthly totals across the five states: June 5800, July 5850, August 5700, September 6300 mm. August has the lowest total.

LCM × HCF of two numbers equals their product, so the numbers multiply to 48. Of the pairs, only 12 and 4 also differ by 8 (12 × 4 = 48, 12 − 4 = 8). The pair 6 and 8 has the right product but differs by only 2.

To average 4 km a day over 7 days he needs 28 km in total. Monday to Friday he covered 3 + 4 + 3.5 + 5 + 4.5 = 20 km, so he must cover 28 − 20 = 8 km in the remaining two days.

16 = 2⁴ and 24 = 2³ × 3. HCF = 2³ = 8 and LCM = 2⁴ × 3 = 48.

Jammu and Kashmir, especially Pampore near Srinagar, produces almost all of India's saffron. Kashmiri saffron has a GI tag and grows in the karewa soils of the valley.

Interest at 12% on Rs 3,000 = Rs 360, so the total to repay = 3000 + 360 = Rs 3,360. In 12 equal monthly instalments, each = 3360/12 = Rs 280.

The official RRB key marks 'Islamic Emirate of Afghanistan', the name the Taliban gave their state (1996–2001, and again since August 2021). Between 2004 and 2021 the country was officially the Islamic Republic of Afghanistan.

'you' is in the first two sentences and 'ri' in both codes, so you = ri. 'all' is in the second and third, and 'li' in both, so all = li. In 'all hate you' = 'vi li ri', removing li and ri leaves hate = vi.

The only son of M's grandfather is M's father. M says K is the daughter of that man, so K is M's father's daughter, i.e. M's sister (M is female, being referred to as 'she'). So M is K's sister.

Sum = 2 + 2 + 2 + 4 + 6 + 7 = 23. There are 6 values, so the mean = 23/6 ≈ 3.83.

In 2015 Novak Djokovic won three of the four men's Grand Slam singles titles: the Australian Open, Wimbledon and the US Open. Stan Wawrinka won the French Open.

Interest = 5200 − 4000 = Rs 1,200 in 10 years, so the rate = 1200 × 100/(4000 × 10) = 3%. If the rate rises by 4% to 7%, the total interest = 4000 × 7 × 10/100 = Rs 2,800.

Number the letters of CABINET 1–7: C1 A2 B3 I4 N5 E6 T7. EIACBTN takes them in the order 6, 4, 2, 1, 3, 7, 5. Applying that order to COMPUTE (C1 O2 M3 P4 U5 T6 E7) gives T P O C M E U = TPOCMEU.

The Constituent Assembly adopted the tricolour as India's national flag on 22 July 1947, a few weeks before independence. It was moved by Jawaharlal Nehru and was based on the Swaraj flag designed by Pingali Venkayya.

Milk turns sour when bacteria (Lactobacillus) ferment its sugar, lactose, into lactic acid. The acid makes milk taste sour and causes its protein (casein) to curdle, the same process used to make curd.

Cost of rice = 10 × 75 = Rs 750; sold at 20% gain for 900. Cost of sugar = 20 × 85 = Rs 1,700; sold at 10% gain for 1,870. Total sale price = 900 + 1870 = Rs 2,770.

Yellow fever is a viral disease spread by the bite of infected female Aedes (and Haemagogus) mosquitoes; only female mosquitoes bite, as they need blood for their eggs. It is not spread through water or air.

The passage says an increasing number of private vehicles is a main reason for slow traffic, so the number of private vehicles has gone up. It does not mention 5–9 pm, does not say double parking is legal, and says nothing about government vehicles.

Ascending order means smallest to largest: 0.65 < 0.67 < 0.76 < 0.86. Only option C lists them that way.

Zee, Colors and Sony are Indian television entertainment channels. 'Screen' is a film awards brand (the Screen Awards) and magazine, not a TV channel, so it does not belong to the group.

The path adds 2.5 m on every side, so the outer dimensions are 10 + 5 = 15 m and 8 + 5 = 13 m. The area including the path = 15 × 13 = 195 sq. m.

Leopard, tiger, jaguar and lion all belong to the cat family (Felidae, big cats of the genus Panthera). The jaguar is not found in India, and their young are called cubs, not kittens.

British rule in India ended on 15 August 1947, when India became independent under the Indian Independence Act 1947. India became a republic later, on 26 January 1950.

Cost = 10 × 400 = Rs 4,000, i.e. Rs 2,000 for each half. One half sold at a 20% loss = 1,600, and the other at a 10% profit = 2,200. Total SP = 3,800, a loss of Rs 200 = 200/4000 × 100 = 5% loss.

Dipti's mother's father is Dipti's maternal grandfather, and his only granddaughter is Dipti herself. Yuvraj is the cousin of Dipti's son, so Yuvraj is the son of Dipti's brother or sister. That makes Yuvraj Dipti's nephew.

Cytology (cell biology) is the branch of biology that studies cells: their structure, function and division. Entomology is the study of insects, and 'homoplastic' and 'hormonology' are not names of the study of cells.

Dr. Vikram Sarabhai was the founding chairman of ISRO when it was formed in 1969 (from INCOSPAR, which he had also led). He is called the father of the Indian space programme.

A firewall is a network-security system that monitors and filters traffic between a computer or network and the internet. It can be software, hardware, or a combination of both. It has nothing to do with physical fire; the name comes from fire walls in buildings, so 'protects the computer from fire' is the odd statement.

Radius = 28/2 = 14 m. Area = πr² = 22/7 × 14 × 14 = 616 sq. m. Cost = 616 × 125 = Rs 77,000.

Yankee Stadium, home of the New York Yankees baseball team, is in the Bronx, New York City. The current stadium opened in 2009 beside the original 1923 stadium.

cosec(90° − θ) = 1/sin(90° − θ) = 1/cos θ = sec θ.

SP = CP × 125/100, so CP = 2100 × 100/125 = Rs 1,680.

From HISTORY = 7326845: H 7, I 3, S 2, T 6, O 8, R 4, Y 5. CIVICS = 135312 confirms I = 3 and S = 2, and gives V = 5. So VISITOR = V 5, I 3, S 2, I 3, T 6, O 8, R 4 = 5323684.

The passage ends 'price is what you pay, value is what you should get', advising that spending should be logical and value-based. So when you pay for something, look for value. It does not claim every sale cheats consumers or that all people spend impulsively.

An electric motor converts electrical energy into mechanical energy (rotation), using the force on a current-carrying conductor in a magnetic field. A generator does the reverse.

When a car turns, our body tends to keep moving straight because of inertia. In the car's turning frame this is felt as an outward push, called the centrifugal force. The real inward force that turns the car is the centripetal force, provided by friction on the tyres.

The Prime Minister is the ex-officio President of the Council of Scientific and Industrial Research (CSIR), India's largest network of research laboratories, founded in 1942.

Bharati, near the Larsemann Hills in East Antarctica, is India's newest Antarctic research station. It became operational in 2012 and was formally commissioned later; India's other stations are Dakshin Gangotri (now closed) and Maitri.

Time for the first 30 km = 30/60 = 0.5 h, and for the next 20 km = 20/80 = 0.25 h. Average speed = total distance / total time = 50/0.75 ≈ 66.67 km/h.

Gagan Narang is an Indian shooter who won bronze in the men's 10 m air rifle at the 2012 London Olympics. He has also won several Commonwealth Games gold medals.

Each term is double the previous one minus 1: 12 × 2 − 1 = 23, 23 × 2 − 1 = 45, 45 × 2 − 1 = 89, and 89 × 2 − 1 = 177.

Microsoft was founded by Bill Gates and Paul Allen on 4 April 1975 in Albuquerque, New Mexico; it later moved to Redmond, Washington.

Letters take their alphabet positions: F = 6 and THE = 20 + 8 + 5 = 33. WOMAN = 23 + 15 + 13 + 1 + 14 = 66.

With × → +, ÷ → ×, + → − and − → ÷, the expression 22 + 36 − 12 × 6 ÷ 4 becomes 22 − 36 ÷ 12 + 6 × 4. Division and multiplication first: 36 ÷ 12 = 3 and 6 × 4 = 24. Then 22 − 3 + 24 = 43.

The adrenal and pituitary are endocrine glands, and the liver is the largest gland in the body (it secretes bile). The gall bladder only stores and concentrates the bile made by the liver; it does not secrete anything itself, so it is not a gland.

Wrestler Babita Kumari, a Commonwealth Games gold medallist, received the Arjuna Award in 2015. M. R. Poovamma, a sprinter, got it the same year for athletics.

An IPv4 address such as 192.168.1.10 is written as four numbers separated by dots. Each number represents 8 bits and is called an octet, with a value from 0 to 255.

Adding the equations: 2x = 26, so x = 13 and y = 6. Then xy = 13 × 6 = 78.

The tap fills 1/20 of the tank per minute and the leak empties 1/60. Net filling = 1/20 − 1/60 = 2/60 = 1/30 per minute, so the tank fills in 30 minutes.

Overall mean 58 = 0.2 × 60 + 0.3 × 40 + 0.5 × m, where m is the mean of the remaining 50%. So 58 = 12 + 12 + 0.5m, giving 0.5m = 34 and m = 68.

Parliament House (Sansad Bhavan) in New Delhi, designed by Edwin Lutyens and Herbert Baker, was built between 1921 and 1927 and opened in January 1927. A new Parliament building was inaugurated in 2023.

Anaemia is a shortage of red blood cells or of haemoglobin in them, which reduces the oxygen the blood can carry. It is most often caused by iron deficiency, and symptoms include tiredness and pale skin.

Volleyball lovers are 'only volleyball' (5) plus 'volleyball and football' (10) = 15. So 50 − 15 = 35 kids do not like volleyball.

Football lovers = only football (25) + volleyball and football (10) = 35. Only basketball = 10. Ratio = 35/10 = 7/2.

Kids who like exactly one sport = only basketball (10) + only football (25) + only volleyball (5) = 40. The other 10 like two sports.

Each pair matches a thing with its natural colour: snow is white, blood is red and grass is green. The sky is blue, not brown, so Brown : Sky is the odd pair.

Delhi's odd–even scheme (first trial 1–15 January 2016) let private cars run on alternate days according to whether the last digit of their registration number was odd or even, to cut air pollution.

The passage says eating out is not a luxury, because over-worked, time-pressed poor people also need to eat out. So for the poor too, eating out is need-based. It does not directly say the tax must be reduced.

A 5% grace on each subject multiplies every mark by the same factor, 1.05: x, 2x, 3x become 1.05x, 2.1x, 3.15x. Multiplying all terms by the same number leaves the ratio unchanged at 1 : 2 : 3.

Let the time be t hours. At 60 km/h the bus covers 20 km more than at 50 km/h in the same time: 60t − 50t = 20, so t = 2 h. The actual distance = 50 × 2 = 100 km.

The Hornbill Festival is held every year from 1 to 10 December at Kisama Heritage Village near Kohima, Nagaland. It showcases the culture of the Naga tribes and is named after the hornbill bird.

A rhombus is a four-sided polygon, an octagon has eight sides and a hexagon six, so those pairs are correct. A nonagon has nine sides, not seven (a seven-sided polygon is a heptagon), so 'Nonagon : Seven-sided polygon' is the odd, incorrect pair.

The fourth proportional x satisfies 9 : 17 = 27 : x. So x = 17 × 27/9 = 17 × 3 = 51.

A budget (fiscal) deficit is the gap by which the government's total expenditure exceeds its total receipts excluding borrowings. It shows the amount the government must borrow to meet its expenses in that year.

INS Vikramaditya, a modified Russian Kiev-class carrier (formerly Admiral Gorshkov), was commissioned in November 2013 and formally dedicated to the nation by PM Narendra Modi in June 2014. INS Viraat was retired in 2017, and the indigenous INS Vikrant was commissioned in 2022.