RRB NTPC Mock Test - 13 (English) - Railways MCQ

• 31 pairs of Spinal nerves are found in humans.
• Out of the 31 pairs, 8 cervical, 12 thoracic, 5 lumbar, 5 sacral and 1 coccygeal.
• 10 pairs of Spinal nerves are found in frogs.
• 37 pairs of Spinal nerves are found in rabbits.

Principal Amount = Rs. 2000

Amount = Rs. 2420

Number of years = 2

Amount = P(1 + r/100)^t, where P is the principal, r is the rate of interest and t is the time period

2420 = 2000 (1 + r/100)²

1.21 = 1.0201r²

Budapest is known as the Pearl of the Danube

Let, the average speed of truck = x km/hr

According to problem,

⇒ 35x = 1925

⇒ x = 55

∴ average speed of the truck = 55 km/hr

• Aryabhatta was the first satellite launched by India.
• It was launched on April 19, 1975, from Kapustin Yar.
• Rohini became the first satellite to be placed in orbit by an Indian-made launch vehicle.
• Sputnik 1 was the world’s first artificial satellite launched by the Soviet Union.

Let income of P be x

The income of Q is 20% more than P

So income of Q = x + 20x/100 = 1.2x

The income of R is 30% more than Q.

So income of R = 1.2x + (30 × 1.2x)/100 = 1.56x

% difference in incomes of R and P = [(Income of R - Income of P)/Income of P] × 100%

= [(1.56x - x)/x] × 100% = 56%

● The Telecom Regulatory Authority of India (TRAI) was established with effect from 20th February 1997 by an Act of Parliament, called the Telecom Regulatory Authority of India Act, 1997.

● It was established to regulate telecom services, including fixation/revision of tariffs for telecom services.

● One of the main objectives of TRAI is to provide a fair and transparent policy environment which promotes a level playing field and facilitates fair competition.

● Chairman: Ram Sewak Sharma

Sum of roots = 1

Product of root = – 20

Quadratic equation ⇒ X² – (Sum of root) X + (Product of root) = 0

⇒ X² – (1) X + (– 20) = 0

⇒ X² – X – 20 = 0

Hence, required quadratic equation will be X² – X – 20 = 0

(Sin A + Cos A)² = Sin² A + Cos² A + 2 Sin A Cos A

⇒ (0.5)² = 1 + 2 Sin A Cos A

⇒ 0.25 – 1 = 2 Sin A Cos A

⇒ 2 Sin A Cos A = -0.75

∴ Sin A Cos A = ​-0.375

● A Maths and Physics teacher, Peter Tabichi from a secondary school in a remote village in Kenya’s Rift Valley has won the $1 million Global Teacher Prize for 2019.

● He gives away 80 per cent of his income to help the poor in the remote village of Pwani where almost a third of the children are orphans or have only one parent.

● He received the prize at a ceremony Saturday in Dubai hosted by Hollywood star Hugh Jackman.

● He has become the first ever African male to have won the award.

Sameer’s mother’s mother in law → Sameer’s grandmother.

That lady’s father is the brother of Sameer’s grandmother.

So, the woman is Sameer’s aunt.

• Automatic signal system was started in the Central Railway.
• Its headquarters is in Mumbai at Chhatrapati Shivaji Maharaj Terminus.
• It was founded on 5 November 1951, Mumbai.
• There are total of 18 railway zones in India.

Let, the number = x

After 20% increase, number = x + x × 20/100 = 1.2x

After 15% increase, number = 1.2x + 1.2x × 15/100 = 1.38x

∴ Increase = 1.38x - x = 0.38x

∴ Percentage increase,

⇒ 0.38x/x × 100%

⇒ 38%

Given,

(U + V + W) can complete a work in 15 days.

⇒ (U + V + W)’s one day work = 1/15

U alone can complete the work in 60 days.

⇒ U’s one day work = 1/60

⇒ (V + W)’s one day work = (1/15 - 1/60) = (4 - 1)/60 = 1/20

V + W can complete the same work in 20 days.

● Shivaskandavarman is known as the founder of the Pallava Dynasty.

● The Pallava Dynasty is said to have emerged in South India when the Satavahana dynasty was on the decline.

● During their reign, Pallavas made Kanchi as their capital.

● Pallavas became a major power during the reign of Mahendravarman I and Narasimhavarman I.

Thus image at option 1 completes the given pattern.

1) UELBOOKB = BLUEBOOK (An official report of the British Government)

2) REENGOOKB = GREENBOOK (An official publication of Iran and Italy)

3) ERDOOKB = REDBOOK (Not an official book)

4) ITEWHOOKB = WHITEBOOK (An official publication of China)

Hence option ERDOOKB is the correct answer.

Follow BODMAS rule to solve this question, as per the order given below,

Step-1- Parts of an equation enclosed in 'Brackets' must be solved first, and in the bracket, the BODMAS rule must be followed,

Step-2- Any mathematical 'Of' or 'Exponent' must be solved next,

Step-3-Next, the parts of the equation that contain 'Division' and 'Multiplication' are calculated,

Step-4-Last but not least, the parts of the equation that ​contain 'Addition' and 'Subtraction' should be calculated.

4015 × 73 - 21817 = ? × 112 + 126

⇒ 293095 - 21817 = ? × 112 + 126

⇒ 271278 = ? × 112 + 126

⇒ ? × 112 = 271278 - 126

⇒ ? = 271152/112

∴ ? = 2421

Assam is the largest bamboo producing state in India.

India is the second largest producer of bamboo behind China.

Bamboo is used for multiple purposes like in the construction of buildings and in the making of furniture and various devices.

Assam also has a Bamboo Technology Park worth Rs. 62.28 crore build in 2017 at the Chaygaon in Kamrup district. 

Let the two numbers be x and y.

Given,

xy = 2500

And x is four times y.

⇒ x = 4y      ----(1)

Putting the value of x in (1), we get

⇒ 4y² = 2500

⇒ y² = 625

⇒ y = 25

The numbers are x = 4 × y = 100 and y = 25

Sum of two numbers = 100 + 25 = 125

Previous

Divisibility rule of 8: If the last three digits of a whole number are divisible by 8, then the entire number is divisible by 8.

The last three digits of the given number are 116

116 = 14 x 8 + 4

As the remainder is 4, the least number to be added to make it divisible by 8 is 8 - 4 = 4

The least number that should be added to 116 to make it divisible by 8 is 4.

• Evangelista Torricelli invented Barometer.
• It was invented in 1644 in Italy.
• It is used for measuring atmospheric pressure, used especially in forecasting the weather and determining altitude.

Kamal remembers his birthday is before 24th April (i.e. on 23^rd, 22^nd, 21^st… etc.) while his mother remembers that his birthday is after 22nd April (i.e. on 23^rd, 24^th, 25^th… etc.). Combining both the statements we get only one possible date which is 23^rd April.

Hence, 23 is the correct alternative.

Geoffrey Chaucer is known as the "Father of English Poetry".

Consider the following least possible Venn diagram,

Conclusions:

I. All tables are cups → False (It is possible but not definite).

II. Some tables are cups → True (It is definitely true as some tables are chairs and all chairs are cups).

Hence, only conclusion II follows.

3375, 2744 and 8 are cubes of 15, 14 and 2 respectively, but 980 is not the cube of 1.

Hence, 980 is the odd one out.

• All of the Carnatic wars were military conflicts between French East India and the British East India Company in the 18th century.
• The French wanted to reduce the growing influence of the English in the Carnatic.
• They were fought on Indian territories that were dominated by the Nizam of Hyderabad up to the Godavari delta.
• The war ended in 1754 with the Treaty of Pondicherry.

PSMO and GMAE

Alphabetical position of P is 16. There are 16 letters in between P and G. (In reverse order)

Alphabetical position of S is 19. There are 19 letters in between S and M. (In reverse order)

Alphabetical position of M is 13. There are 13 letters in between M and A. (In reverse order)

Alphabetical position of O is 17. There are 17 letters in between O and E. (In reverse order)

Similary for HSDB

Alphabetical position of H is 8. There are 8 letters in between H and Q. (In reverse order)

Alphabetical position of S is 19. There are 19 letters in between S and M. (In reverse order)

Alphabetical position of D is 8. There are 8 letters in between D and Q. (In reverse order)

Alphabetical position of B is 2. There are 2 letters in between B and E. (In reverse order)

The word related to HSDB is QMIE.

Multiples of both 5 and 3 means multiples of 15

∴ Multiples of 15 that are less than 320 are,

⇒ 15, 30, 45, 60, 75, 90, 105, 120, 135, 150, 165, 180, 195, 210, 225, 240, 255, 270, 285, 300, 315

∴ There are 21 numbers less than 320 which are multiples of both 5 and 3

Vilas remembers his marriage is after 4^th July (i.e. on 5^th, 6^th, 7^th, etc.) while his sister remembers his marriage is before 6^th July (i.e. on 5^th, 4^th, 3^rd etc.). Combining both the statements we get only one possible date which is 5^th July.