RRB NTPC 2016 PYQs

Question 1

Which two signs should be interchanged to make the following equation correct?5 × 45 − 15 + 31 ÷ 41 = 5

Accepted Answer

Interchanging ÷ and − gives 5 × 45 ÷ 15 + 31 − 41. Following BODMAS, 5 × 3 + 31 − 41 = 15 + 31 − 41 = 46 − 41 = 5. Thus, option 1 is correct.

Question 2

Four pair of words are given below out of which three are alike in some manner and one pair is different. Which is different from the rest?

Accepted Answer

All pairs except 'Long : High' are antonyms. 'Long' and 'High' are not direct opposites, making it the different pair.

Question 3

If sin θ — cos θ = 0, then what is the value of the expression:(sin6θ+cos6θ)?

Accepted Answer

From sin θ - cos θ = 0, we get tan θ = 1, so θ = 45°. Substitute θ = 45° into the expression: (sin6 45° + cos6 45°) = (1/√2)6 + (1/√2)6 = 1/8 + 1/8 = 2/8 = 1/4.

Question 4

Read the statements and select a conclusion from the given alternatives:Statements:All the wires are books.All the plates are books.Some wallets are plates.Conclusions:Some wires are plates.Some books are wires.some books are wallets

Accepted Answer

From 'All wires are books', 'Some books are wires' is valid. From 'Some wallets are plates' and 'All plates are books', 'Some wallets are books' (or 'Some books are wallets') is valid. Conclusion (1) is invalid.

Question 5

Which of the following is the idea that new species are formed from the sudden and unexpected emergence of alterations in their defining traits?

Accepted Answer

Mutation is defined as a sudden, heritable change in an organism's genetic material, leading to new traits and potentially new species.

Question 6

If selling price is ₹ 84 & gain percentage = 20% Calculate the cost price.

Accepted Answer

Cost Price = Selling Price / (1 + Gain Percentage). So, CP = 84 / (1 + 0.20) = 84 / 1.20 = ₹ 70.

Question 7

The river Godavari does NOT pass through which of the following states?

Accepted Answer

The Godavari River flows through Maharashtra, Chhattisgarh, Telangana, Andhra Pradesh, and Odisha. Gujarat is not part of its basin.

Question 8

Directions (Qs 13-15): Based on the information given below, answer the following questions.
In an Exhibition, seven air conditioners of different companies- LG, Carrier, Samsung, Godrej, Whirlpool, Hitachi and Videocon  are kept facing east in the following order:
LG is next to right of Videocon.
Videocon is fourth to the right of Samsung.Godrej air conditioner is between air conditioner Carrier andHitachi.Samsung, which is third to the left of air conditioner Carrier, isat one end.

What is the ratio of the expenditure on infrastructure and transport to the total expenditure on taxes interest on loans of Zeta Interactive Services ?

Accepted Answer

Expenditure on infrastructure and transport = 20 + 25 = 45. Expenditure on taxes and interest on loans = 15 + 25 = 40. The ratio is 45:40, which simplifies to 9:8.

Question 9

Given below are parts of a statement. Select the correct order of these parts to make a meaningful statement.P: the impact business management choicesQ: the impact of climate change wasR: would have on profitabilityS: not as significant as

Accepted Answer

The correct order forms the sentence: 'The impact of climate change was not as significant as the impact business management choices would have on profitability.' Q starts the sentence, followed by S, then P, and finally R.

Question 10

Directions (Qs 13-15): Based on the information given below, answer the following questions.
In an Exhibition, seven air conditioners of different companies- LG, Carrier, Samsung, Godrej, Whirlpool, Hitachi and Videocon  are kept facing east in the following order:
LG is next to right of Videocon.
Videocon is fourth to the right of Samsung.Godrej air conditioner is between air conditioner Carrier andHitachi.Samsung, which is third to the left of air conditioner Carrier, isat one end.

If the expenditure of Zeta Interactive Services on advertisement is ₹ 2.10 crores then the difference between the expenditure on transport and taxes is

Accepted Answer

Advertisement is 15% of total expenditure. If 15% = ₹2.10 crores, then 1% = ₹0.14 crores. Transport (20%) - Taxes (17.5%) = 2.5%. So, 2.5% = 2.5 * ₹0.14 crores = ₹0.35 crores or ₹35 lakhs.

Question 11

An Integrated circuit, also referred as IC chip, is a set of electronic circuit on a small plate which is made of:

Accepted Answer

Integrated circuits (IC chips) are primarily made from silicon, a semiconductor material, due to its excellent electrical properties for controlling current flow.

Question 12

A shopkeeper purchased a stereo system of marked price ₹ 2000, at successive discounts of 10% & 15% respectively. He then spent ₹ 70 on packaging and sold it at ₹ 2000. Calculate his gain percentage.

Accepted Answer

Calculate the purchase price after successive discounts. Add packaging cost to find total cost. Then, calculate profit and express it as a percentage of the total cost.

Question 13

Which of the following is a waterborne disease causing acute gastrointestinal infection?

Accepted Answer

Cholera is a bacterial disease typically spread through contaminated water, causing severe diarrhea and dehydration, fitting the description of acute gastrointestinal infection.

Question 14

Who among the following is/was not associated with Cricket?

Accepted Answer

Farhaan Behardien, Aaron Phangiso, and Vernon Philander are all cricketers. Stan Wawrinka is a famous tennis player, not associated with cricket.

Question 15

Which of the following is the outermost part of human skin?

Accepted Answer

The epidermis is the outermost layer of the human skin, providing a protective barrier against the environment.

Question 16

If HOUSE is coded as 10-13-23-17-7, then how will you code REHEARSE?

Accepted Answer

The pattern is (Letter Position + 2) for consonants and (Letter Position - 2) for vowels. Apply this rule to REHEARSE: R(18+2=20), E(5-2=3), H(8+2=10), E(5-2=3), A(1-2=-1, so 25), R(18+2=20), S(19+2=21), E(5-2=3).

Question 17

Under a new scheme, a bank offers an interest of 30% per annum compounded annually. Suraj deposits ₹ 10,000 under this new scheme and at the end of the tenure receives ₹ 28,561. What was the tenure of the scheme that Suraj had chosen?

Accepted Answer

Use the compound interest formula A = P(1 + R/100)^T. Substitute A=28561, P=10000, R=30. Solve for T by recognizing (1.3)^4 = 2.8561, so T=4 years.

Question 18

Indian National Army was formed by:

Accepted Answer

The Indian National Army (INA) was initially formed by Mohan Singh in 1942. Subhash Chandra Bose later revived and led it.

Question 19

If two supplementary angles are in the ratio of 4 : 5, find the ratio of the square of the first angle to the square of the second angle.

Accepted Answer

Supplementary angles sum to 180°. The angles are 4x and 5x, so 9x = 180°, making x = 20°. The angles are 80° and 100°. Their squares are 6400 and 10000, ratio 16:25.

Question 20

Factors ofx2– 6x + 8 are:

Accepted Answer

To factor x² – 6x + 8, find two numbers that multiply to 8 and add to -6. These numbers are -4 and -2. So, the factors are (x - 4)(x - 2).