Search Previous Year Questions

Given:

A sum becomes \({2} {1 \over 2}\) in 6 years.

Calculation:

From the data,

Sum = \( {5 \over 2}\) in 6 years

In 12 years,

Sum = \( {5 \over 2}\) × \( {5 \over 2}\) = \( {25 \over 4}\)

In 18 years,

Sum = \( {5 \over 2}\) × \( {5 \over 2}\) × \( {5 \over 2}\) = \( {125 \over 8}\)

∴ The sum becomes \( {125 \over 8}\) in 18 years.

Preparing the family tree using the following symbol:

Family Tree :-

G's father is X's son.

Y is X's brother and P is G's uncle.

∴ Here, 'Y' is uncle of 'P'

Hence, the correct answer is "Uncle".

The correct answer is Prof. Jyotirmoyee Das.

Key Points

• Dr Jyotirmayee Dash and Dr Subi Jacob George have each received the Bhatnagar Puroshkar award in the field of chemical sciences.
• Dr Subi Jacob George is from the Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Bengaluru.
• Dr Jyotirmayee Dash is from the Indian Association for the Cultivation of Science (IACS), Kolkata.
• At the Indian Association for the Cultivation of Science in Kolkata, Jyotirmayee Dash is a professor.

Important Points 

• Her areas of interest in research are generally chemical biology and organic chemistry.
• Jyotirmayee Dash earned her Ph.D. in synthetic organic chemistry from Ravenshaw University, Cuttack, in 2003.
• She held the titles of Marie-Curie Fellow at the University of Cambridge in the United Kingdom, Alexander von Humboldt Fellow at Freie Universität Berlin in Germany, and postdoctoral fellow at ESPCI Paris in France.
• She joined Indian Association for the Cultivation of Science in 2014 after serving as an assistant professor at the Indian Institute of Science Education and Research in Kolkata for three years.

Additional Information

• Each year, the finest achievements in science and technology are recognised with the Shanti Swarup Bhatnagar (SSB) Prize.
• Each year, SSB Prizes of Rs 5 lakh are given out for noteworthy and excellent research in either fundamental or applied fields.
• The Shanti Swarup Bhatnagar award honours excellent scientific and technological achievements in India.
• Any Indian citizen working on research in any area of science and technology who is under 45 as of December 31 of the year before the award year is eligible for this award.
• People of Indian origin (PIO) who work in India and Indian citizens living abroad are also eligible.

Given:

Time taken to travel is reduced by 20%

Concept used:

\(Speed = {Distance \over Time}\)

Calculation:

Let us consider distance as 'X' and time as 'T'

From the given data,

New time (T1) = T - 20%T

T1 = \(x = T - {20 \over 100 }T\)

New time (T1) = 0.8T

Now,

New speed (S1) = \( {X \over T1}\)

Substitute the value of T1

⇒ S1 = \( {X \over 0.8T}\)

⇒ S1 = \( {X }\over {8\over10}T\)

⇒ S1 = \( {10X }\over {8}T\)

⇒ S1 = \( {5X }\over {4}T\)

⇒ S1 = \( {5 }\over {4}\) S

⇒ Speed percentage

⇒ \( {(S1 ;- ;S) \over S} \) × 100

⇒ \( {{5\over4}S ;- ;S \over S} \) × 100

⇒ \({5S;-;4S} \over 4S\) × 100

⇒ \( {S \over 4S}\) × 100 = 25 %

∴ Train should increase the speed by 25%.

The correct answer is Karnataka.

Key Points

• Before the founding of the East India Trading Company, in 1670, coffee was first seen in India.
• On his way back from Yemen, an Indian Sufi saint by the name of Baba Budan introduced coffee beans into the nation.
• Notably to the town of **Chikmagalur, Karnataka in the south of India.**​
• Chikmagalur, where coffee was initially produced, continues to be a major producer today.

Important Points

• The state of southern India, Karnataka views coffee as one of the most crucial components of its economy.
• For the most part, Arabica beans are grown in this town, mostly in the steeper, hillier areas.
• The lower-quality Robusta beans are grown in the shallower, lower hills.
• India established a Coffee Board, a department located in the town that regulates coffee production and marketing in its district.

Additional Information

• Currently, the hilly region of Southern India accounts for a sizable share of India's coffee output.
• Karnataka makes up the majority (53%), followed by Kerala (28%), Tamil Nadu (11%), and Kerala.
• In addition to the "Seven Sister States of India" in northeastern India, which are noted for their political, social, and economic resemblances on coffee production.
• Other states in India that grow coffee include Andhra Pradesh, Orissa, Manipur, Meghalaya, Mizoram, Tripura, Nagaland, and Arunachal Pradesh.

Given,

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z.

1. The tenth letter to the left of the letter preceding the end of the above alphabet :

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

2. The eighth letter to the right of the letter which is tenth letter to the left of the last but one letter of the alphabet is :

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Hence, the correct answer is "W".

Given:

Shyam borrowed = Rs. 12,000 (Principal amount)

Shyam paid back = Rs. 15,600 (Total amount)

Rate of interest = 6%

Concept used:

Total amount = Simple Interest + Principal amount

⇒ \(SI = {PNR \over 100}\)

Calculation:

From the given data,

⇒ 15600 = SI + 12000

⇒ SI = 3600 ------ (1)

Substitute the formula of SI in equation (1)

⇒ \({PNR \over 100} \) = 3600

⇒ \({(12000)(N)(6) \over 100}\) = 3600

⇒ \({(120)(N)(6)}\) = 3600

⇒ 720N = 3600

⇒ N = \( {3600 \over 720}\)

⇒ N = 5

∴ Shyam returned the money after 5 years.

The correct answer is Krishna river.

Key Points

• In southern India, the Tungabhadra River is a sacred river.
• To get to Andhra Pradesh, it passes through the state of Karnataka.
• The Tunga River and the Bhadra River meet each other to form the Tungabhadra river.
• Thunga and the Bhadra travel 147 and 171 kilometers before they are joining at Kudali, respectively.
• At Gondimalla in Andhra Pradesh, Thungabhadra merges with the Krishna after meandering across the plains for 531 kilometres.
• It is a tributary of the Krishna river.

Additional Information

• Tunga River and the Bhadra Rivers receive input from more than 100 tributaries, streams, creeks, rivulets, and other similar water sources.
• At a height of roughly 1,196 m, it flows down the eastern Western Ghats slope in the state of Karnataka.

Given:

'M' number of men agreed to purchase an article for 'Rs. R'

4 men dropped out from the purchase.

Calculation:

Contribution of each person = \( {R \over M}\)

Contribution after 4 men dropped = \( {R \over M;-;4}\)

Now,

Required contribution = \( {R \over M;-;4 } - {R \over M}\)

⇒ \( {RM ; - ; RM; + ; 4R \over M(M;-;4)}\)

⇒ \( { 4R \over M^2;-;4M}\)

∴ Each men have to contribute \( { 4R \over M^2;-;4M}\) to purchase the article at the same price.

The correct answer is Mizoram.

Key Points

• The majority of the nation's forests are found in Madhya Pradesh.
• It is followed by Arunachal Pradesh, Chhattisgarh, Odisha, and Maharashtra.
• The top five States in terms of forest cover as a percentage of total land area.
• They are Mizoram, Arunachal Pradesh, Meghalaya, Manipur, and Nagaland.
• The term "forest area" refers to the land's legal status according to government records.
• The term "forest cover" refers to the presence of trees on any given piece of land.

Additional Information

• The India State of Forest Report-2021 was published by the Union Ministry of Environment, Forests and Climate Change (MoEFCC).
• The Forest Survey of India publishes a report on India's forest and tree cover every two years.
• The first survey, ISFR 2021, was released in 1987, making it the 17^th.
• India is one of the few nations in the world to conduct this type of poll every two years.
• It is usually regarded as thorough and reliable.
• The forestry, agroforestry, and forest management sectors all use the ISFR for planning and policy-making.