RRB NTPC CBT 1 2016: questions with answers

The Himalayan Forest Thrush (Zoothera salimalii), described in 2016 and named after Salim Ali, was found in the forests of Northeast India (Arunachal Pradesh) and adjoining China.

Leprosy is called Hansen's disease after Gerhard Hansen, who identified its cause, the bacterium Mycobacterium leprae.

Chhatrapati Shivaji Terminus, the Taj Mahal and the Sun Temple (Konark) are UNESCO World Heritage Sites; Rashtrapati Bhavan is not.

Other side = √(13² − 12²) = √25 = 5 m. Area = 12 × 5 = 60 sq.m.

Rahul Dravid (A) coached the India U-19 team at the 2016 U-19 World Cup in Bangladesh, where India finished runners-up.

Petrol is refined from crude oil, so a fall in the international crude price (II) causes the fall in the domestic petrol price (I).

Actual distance = 22.25 × 18.5 = 411.625 km.

Silent Valley, Indus Valley and Damodar Valley are in the Indian subcontinent; Santa Clara Valley (Silicon Valley) is in California, USA.

Kidambi Srikanth (A) received the Arjuna Award for badminton in 2015.

From the first two codes, 'are' and 'you' are 'let' and 'net', so 'john' = 'fat'. Then 'is good' = 'get set', but nothing tells which of the two is 'is'. It cannot be determined.

India has set up three research stations in Antarctica: Dakshin Gangotri (1983), Maitri (1989) and Bharati (2012).

60 km/h = 60 × 5/18 = 50/3 m/s. Length = speed × time = 50/3 × 30 = 500 m.

Jantar Mantar in Delhi was built in 1724 by Maharaja Sawai Jai Singh II of Jaipur.

If service cannot be enforced and must come from within, it should be voluntary, so I follows. The statement never says employees do not serve customers, so II does not follow.

According to the India State of Forest Report 2015, Madhya Pradesh has the largest forest cover by area, followed by Arunachal Pradesh and Chhattisgarh.

9876 + 34.567 = 9910.567. ? = 9910.567 − 9908.221 = 2.346.

Let C = x. Then B = 3x and A = 2 × 3x = 6x. Total 10x = 1800, so x = 180 and B's share = 3 × 180 = Rs. 540.

A cell phone is used for communication; a cycle is used for transportation.

SSB, BSF and ITBP are Central Armed Police Forces under the Ministry of Home Affairs. The Railway Protection Force comes under the Ministry of Railways.

Nitrous oxide (N₂O) is known as laughing gas, and it is also a greenhouse gas.

(a + b + c)² = a² + b² + c² + 2(ab + bc + ca). So 36 = 14 + 2(ab + bc + ca), giving ab + bc + ca = 11.

In 2006 the IAU reclassified Pluto as a dwarf planet.

Biogas is mostly methane (about 50–75%), with carbon dioxide making up most of the rest.

Mac OS is Apple's operating system, first released with the Macintosh in 1984.

Each term takes five consecutive letters in the order 2nd, 4th, 1st, 3rd, 5th: ABCDE → BDACE, FGHIJ → GIFHJ, KLMNO → LNKMO, PQRST → QSPRT.

LCM of 3, 4, 5 and 6 is 60. The next multiple of 60 after 3105 is 3120 (60 × 52), so 3120 − 3105 = 15 must be added.

Take each vessel as 1 unit. Milk = 1/4 + 2/3 = 11/12; water = 3/4 + 1/3 = 13/12. Ratio = 11 : 13.

Carbon dioxide is heavier than air and does not support combustion, so it smothers a fire by cutting off oxygen.

Saturn is a planet, the Sun a star and Titan a satellite, but the Milky Way is a galaxy, not a constellation.

After entering Bangladesh, the main stream of the Ganga is called the Padma.

Time taken is inversely proportional to efficiency, so the ratio of days = 7 : 5.

Students who like both algebra and physics = 60 − (12 + 13 + 10 + 5 + 8 + 5) = 7. Physics but not geometry = only physics + algebra and physics = 8 + 7 = 15.

More than one subject = algebra and trigonometry (5) + physics and geometry (5) + algebra and physics (7) = 17.

Algebra = 12 + 5 + 7 = 24; geometry = 13 + 5 = 18. Ratio = 24 : 18 = 4 : 3.

Asha's only paternal aunt is Sagar's sister, so her grandfather Aniket is Sagar's grandfather too. Sagar is therefore the grandson of Aniket's wife.

Each word is the sum of its letters' alphabet positions: OWL = 15 + 23 + 12 = 50. TIME = 20 + 9 + 13 + 5 = 47.

'ride' = 3218 and 'dirt' = 4213 share r, i, d ↔ 3, 2, 1, so e = 8 and t = 4. 'like' = 8562 with e = 8 and i = 2 gives l, k = 5, 6. In 'talk' = 7564, t = 4 and l, k = 5, 6, so a = 7.

GPS is a space-based navigation system used for traffic mapping and in-car navigation. GPS data (for example, GPS radio occultation) is also used in weather and cyclone forecasting, so the claim that it cannot predict cyclones is the statement marked not true.

Under the President (Discharge of Functions) Act, 1969, the Chief Justice of India acts as President when both offices are vacant.

a + b + c = 54 and b + c + d = 42, so a − d = 12. With a + d = 16, 2d = 4, so d = 2.

Father = 52, so mother = 50. Elder sister = 50/2 = 25, and the younger sister = 25 − 2 = 23.

Amount = P(1 + 0.15 × 3) = 1.45P = 8700, so P = Rs. 6,000.

Each letter moves back by one, except the middle letter, which stays the same: PIXIE → O H X H D. ELEANOR (middle letter A) → D K D A M N Q.

Small: 60 × 10 = Rs. 600. Big: 120 × 15 = Rs. 1,800. Total = Rs. 2,400. Discount = 5% of 2,400 = Rs. 120.

Quadrennial means once every four years (biennial = 2 years, triennial = 3 years, perennial = lasting all year).

L + M: L is M's mother. M × N: M is N's maternal aunt, i.e. M is the sister of N's mother. So L is the mother of N's mother, N's maternal grandmother.

(a + b)² − (a − b)² = 4ab, so the expression = 4ab / ab = 4.

cosθ × tanθ = sinθ. cosθ = √3/2 gives θ = 30°, so sinθ = 1/2.

A generator converts mechanical energy into electrical energy by electromagnetic induction.

With x notes of each kind, 5x + 10x + 20x = 35x = 385, so x = 11. Total notes = 3 × 11 = 33.

Ctrl + V (A) pastes; Ctrl + Z undoes, and Alt + F4 closes the window.

Sorted: 1.9, 3.6, 5.8, 8.4. Median = (3.6 + 5.8)/2 = 4.7.

After swapping: 4 × 6 + 1 − 15 ÷ 3 = 24 + 1 − 5 = 20.

HTML is a markup language for web pages. SSH, PPP and POP are network protocols.

Mean of 1 to n = (n + 1)/2 = 12/2 = 6.

India's National Air Quality Index (2014) uses eight pollutants: PM10, PM2.5, NO₂, SO₂, CO, O₃, NH₃ and Pb.

South 15, right (west) 35, right (north) 15 brings her back level with the house, 35 km west. Turning left (west) for 5 km more puts her 35 + 5 = 40 km from home.

Every particle of a spinning top moves in a circle, and the force that keeps it moving in a circle, directed towards the axis, is the centripetal force.

Some teachers are sad, and sad people may cry, so some teachers may cry. The other conclusions over-generalise.

Replacing the letters: 24 − 6 ÷ 2 × 9 + 17 = 24 − 27 + 17 = 14.

Dr. Web is an anti-virus program; CodeRed, Melissa and CryptoLocker are malware.

PM Narendra Modi opened the 12th South Asian Games at Guwahati (B) on 5 February 2016.

Anand lost the 2014 World Chess Championship in Sochi to Magnus Carlsen (D).

Spinach, coriander and lettuce are leafy vegetables; lentil is a pulse.

(a − b)³ = a³ − 3a²b + 3ab² − b³, so (a − 4)³ = a³ − 12a² + 48a − 64.

B does the whole work in 40 days (rate 1/40). B and C do the remaining 1/2 in 4 days, so together their rate is 1/8. C = 1/8 − 1/40 = 4/40 = 1/10, so C alone takes 10 days.

Losoong is the Sikkimese (Bhutia) new year and harvest festival, celebrated in Sikkim.

Karagam (Karakattam) is a folk dance of Tamil Nadu. Koodiyattam and Kathakali are from Kerala, Yakshagana from Karnataka.

CP = 1235 / 0.95 = Rs. 1,300. For 10% profit, SP = 1300 × 1.10 = Rs. 1,430.

22x − 3x = 207 + 40, so 19x = 247 and x = 13.

The numbers are 4 × 8 = 32 and 3 × 8 = 24. LCM = 8 × 4 × 3 = 96.

Raised (intaglio) printing is used for the RBI seal, the Guarantee clause, the Governor's signature and 'RESERVE BANK OF INDIA' on Indian notes.

The Civil Disobedience Movement, launched after the Lahore Congress (1929) with the Dandi March (1930), aimed to completely defy the British government's orders and laws.

The official RRB answer key gives 1946. In March 1946 the Attlee government announced the Cabinet Mission to arrange the transfer of power, accepting Indian independence; the Indian Independence Act followed in July 1947.

R's mother's mother-in-law is R's paternal grandmother, so her only daughter Y is R's paternal aunt. Q, Y's husband, is R's paternal uncle (by marriage).

Beetroot, turnip, carrot and radish are all edible roots.

SUVNE = VENUS, ARMS = MARS, RUJTIPE = JUPITER are planets; APTLE = PLATE (or PETAL) is not.

Akash has been test-fired from the Integrated Test Range off Odisha, which includes Abdul Kalam Island (formerly Wheeler Island). The other options are a satellite launch site, a sounding-rocket station and a nuclear test site.

CP = 920 / 1.15 = Rs. 800. For 20% profit, SP = 800 × 1.20 = Rs. 960.

Yeast's enzymes ferment the sugars in dough, releasing carbon dioxide that makes bread rise.

Area = ½ × base × height, so base = 2 × 456 / 24 = 38 cm.

Louis Pasteur developed the rabies vaccine in 1885. The smallpox vaccine was Edward Jenner's.

Two series alternate: cubes 1, 8, 27, 64 and squares 1, 4, 9, 16. The missing term is 4³ = 64.

O-J-P and N-K-L must stand together. With P, O, K, N off the ends and M not in the centre, the only possible row is M O J P N K L. M is immediately left of O.

The row is M O J P N K L (see the first question of this set). The 4th position, the centre, is P.

In the row M O J P N K L, the fifth from the left is N.

SI = 5000 × 5 × 2 / 100 = Rs. 500. CI = 5000 × (1.05² − 1) = Rs. 512.50. Difference = Rs. 12.50 (shortcut: P × r² = 5000 × 0.05² = 12.5).

Area = ½ × (a + b) × h, so 18 = ½ × (5 + x) × 3. This gives 5 + x = 12, so x = 7 cm.

In 2016, Indian Railways had 16 zones (17 if Kolkata Metro is counted). South Coast Railway, announced in 2019, became the 18th zone later.

GHL: Fiction 610 − Self-Help 170 = 440.

Totals: ABL 1790, GHL 1710, MNL 1800, PQL 1785. MNL has the most.

Non-Fiction = 500 + 600 + 550 + 600 = 2250; Management = 100 + 130 + 100 + 110 = 440. Difference = 1810.

cotθ / cosecθ = (cosθ/sinθ) × sinθ = cosθ. So the expression = tanθ × cosθ = sinθ.

'Unlike Aryabhata' means Aryabhata is not a natural satellite; it is an artificial one, so I is false. The statement calls the Moon a satellite, not a star, so II is false. Neither follows.

LIGO-India, approved in February 2016, is a planned observatory to detect gravitational waves.

'Most unethical' does not mean it is the only one, so I fails. Fear of falling sick says nothing about unethical people falling sick, so II fails too.

Ban Ki-moon (2007–2016) was the 8th UN Secretary-General. Jim Yong Kim headed the World Bank.

Let x km be walked with L at 3 km/h. Then x/3 + (27 − x)/6 = 7, so 2x + 27 − x = 42 and x = 15. Distance with M = 27 − 15 = 12 km.

Gregor Mendel's pea-plant experiments laid down the laws of inheritance.

Nepal, Pakistan and Sri Lanka use the rupee; Myanmar's currency is the kyat.