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• Red-crowned Crane is the national bird of China.
• Grand Cayman Parrot is the national bird of Cayman Islands.
• Robin is the national bird of Bangladesh.
• Barn Swallow is the national bird of Austria.

• दोहे के पहले और तीसरे चरण में 13-13 मात्राये होती है।
• अतः 13 सही विकल्प होगा।अन्य सभी विकल्प असंगत है।

Additional Information

• छंद शब्द 'छद' धातु से बना है।जिसका अर्थ है 'खुश करना'।
• वर्णों या मात्राओं के नियमित संख्या के विन्यास से यदि आल्हाद पैदा हो तो उसे छंद कहते है।
• जिस प्रकार गद्य का नियामक व्याकरण है।उसी प्रकार पद्य का छंद शास्त्र।

Key Points

• दोहा एक अर्ध सम मात्रिक छंद है।जिसमे प्रथम और तृतीय चरण में 13-13 मात्राये होती है।
• जबकि द्वितीय और चतुर्थ चरण में 11-11 मात्राये होती है।
• उदा. रहिमन पानी राखिये,बिन पानी सब सून।
• पानी गये न उबरे,मोती मानुस चून।।

The correct answer is 'QSPR.'

Key Points

• While arranging the parts of the sentence given in options, we have to find some grammatical or contextual connections between them, so let’s find out.
• In this sentence, we can see that there are different parts like Subject, verb, conjunction, and continuation of the object.
• The first part should be Q as it is providing the subject "Growth of all modern crimes" of the sentence.
• Q should be followed by S as S is providing more information to part Q by incorporating another example of crime.
• S should be followed by P as P is talking about the most significant factor of modern crimes.
• P should be followed by R as R is having the conjunction "and" to connect two reasons for the increase in modern crimes.

​​Correct sentence: In the growth of all modern crimes including crimes against the elders perhaps the most important factor is the failure of planning and governance in the urban population.

Additional Information          

• Before rearranging parts of the sentence, it is very important to read them carefully.
• It is very important to analyze the use of a determiner and conjunction in such cases.
• This confusion can be eradicated by practicing more and more questions of Sentence Jumbles.

Shortcut Trick

For three numbers a, b, and c, the fourth proportional (x) is given by x = (b × c) ÷ a.

Given numbers: 5, 6, and 8.

⇒ Fourth proportional = (6 × 8) ÷ 5

⇒ 48 ÷ 5 = 9.6

∴ The correct answer is 9.6.

Alternate Method

Given:

First number (a) = 5

Second number (b) = 6

Third number (c) = 8

Formula Used:

If a, b, c, and d are in proportion, then a : b = c : d or a/b = c/d, where d is the fourth proportional.

Calculations:

Let the fourth proportional be x.

⇒ 5 : 6 = 8 : x

⇒ 5/6 = 8/x

⇒ 5 × x = 6 × 8

⇒ 5x = 48

⇒ x = 48 ÷ 5

⇒ x = 9.6

∴ The correct answer is 9.6.

Additional Information

Mean Proportional

The mean proportional between two numbers a and b is √(a × b).

Third Proportional

The third proportional to two numbers a and b is c such that a : b = b : c, which means c = b² ÷ a.

Continued Proportion

Three numbers a, b, and c are in continued proportion if a/b = b/c.

The correct answer is Option 1.

Key Points

• A homologous series is a group of organic compounds with the same functional group and similar chemical properties.
• The compounds in a homologous series differ by a constant unit, typically a -CH2- group.
• In option 1, HCHO (formaldehyde), CH3CHO (acetaldehyde), and CH3CH2CHO (propionaldehyde) all belong to the aldehyde group, which is characterized by the presence of the -CHO functional group.
• These compounds show a gradual change in physical properties such as boiling point and solubility, but their chemical properties remain consistent.

Additional Information

• Functional Group:
• A functional group is a specific group of atoms within a molecule that is responsible for the characteristic chemical reactions of that molecule.
• Examples include -OH in alcohols, -COOH in carboxylic acids, and -CHO in aldehydes.
• Homologous Series Characteristics:
• Members of a homologous series have a general formula, like CnH2n+1CHO for aldehydes.
• They show a gradation in physical properties such as boiling and melting points.
• They exhibit similar chemical properties due to the presence of the same functional group.
• Examples of Homologous Series:
• Alkanes (e.g., methane, ethane, propane)
• Alkenes (e.g., ethene, propene, butene)
• Carboxylic acids (e.g., formic acid, acetic acid, propionic acid)
• Importance of Homologous Series:
• Simplifies the study of organic chemistry by grouping similar compounds together.
• Aids in predicting the properties and reactions of compounds within the same series.

The correct answer is Varanasi to New Delhi.

Important Points

• Vande Bharat Express, also known as Train 18, was launched from New Delhi Railway Station on February 15 by Prime Minister Narendra Modi.
• Vande Bharat Express, India’s first semi-high speed train, runs between Varanasi and New Delhi.
• The train was produced locally at the Integral Coach Factory in Chennai in 18 months. It can run up to a maximum speed of 160 km per hour.
• The semi-high speed train is considered a successor to the Shatabdi Express and will eventually replace the 30-year-old passenger train for intercity travel.
• The train commenced its commercial run on 17 February 2019.
• 2^nd Vande Bharat Express runs between New Delhi- Katra.

दिए गए विकल्पों में से "ग्रहण" शब्द अर्पण का विलोम शब्द है। 

Key Points

• अर्पण शब्द का अर्थ है - किसी को कुछ देने का भाव।
• ग्रहण शब्द का अर्थ है - किसी से कुछ लेने का भाव।

Additional Information

• जो शब्द किसी दूसरे शब्द का उल्टा अर्थ बताते हैं।
• उन्हें विलोम शब्द या विपरीतार्थक शब्द या विरुद्धार्थी शब्द कहते है।

उदाहरण - 

Correct answer is: No sooner the teacher enter.

Key Points 

• The error lies in part 1 of the sentence.
• The usage of ‘the teacher entered’ is incorrect instead, use ‘did the teacher enter’.
• According to the rule of Grammar, whenever we use an adverb at the beginning of the sentence, we need to use an inversion form of the verb. Here ‘entered’ is the main verb, so by writing the verb before the subject, we can make the inversion.
• Hence, we need to write ‘did the teacher enter’.
• Also, 'did' is followed by base form of the verb.

Correct sentence: No sooner did the teacher enter the room than the students stood up.

Additional Information

• Normal sentence: You are tired. (The subject is ‘you’. It’s before the verb ‘are’.)
• Question form: Are you tired? (The verb ‘are’ is before the subject ‘you’. They have changed places. This is called inversion.)

Given:

If a certain principal amounts to Rs 87750 with 8% per annum in four years.

Formula Used:

Simple interest (S.I) = (P × R × T)/100 (where P is the principal, R is the rate of interest, T is the time period)

Amount = P + S.I = P + (P × R × T)/100 = P (1 + R × T/100)

Calculation:

Let P be the principal amount at 8% p.a for 4 years.

Now by using the above-mentioned formula the Simple interest will be

⇒ S.I = (P × 8 × 4)/100

And the amount will be = S.I + P

⇒ Amount = (P × 8 × 4)/100 + P = P(132/100)

Now as given Amount is Rs 87750

⇒ 87750 = P(132/100)

⇒ P = Rs 66477.2

∴ The principal is Rs 66477.2

Shortcut Trick Amount  = S.I + P

⇒ Amount = (P × 8 × 4)/100 + P ⇒ 87750 = P(132/100) ⇒ P = 66,477.2

The correct answer is Teeth.

Important Points

• Teeth consist mostly of hard, inorganic minerals like calcium.
• They also contain nerves, blood vessels, and specialized cells.
• They don’t have the regenerative powers that bones do and can’t grow back together if broken. So they are not considered as bone.
• Bones, on the other hand, are covered in a layer of cells called the periosteum that allow the bone to change over time.

Key Points

• The human skeletal system provides a structural framework and supports the body.
• It comprises bones, cartilage, ligaments, and tendons that connect to bones and bones to muscles.
• The human skeletal system provides a definite shape to the body and protection to internal organs.
• At the time of birth, infants have more bones (300 bones), which due to fusion in some of the bones, form larger bones and 206 bones remain in a human adult.
• The skeleton system is divided into two parts:
• Axial skeleton- includes bones of the skull, upper and lower jaws, ribs, and vertebral column.
• Appendicular skeleton- involves the bone of legs and hand, pectoral and pelvic girdle.

Additional Information

• Hair, Nails, Hooves are made of a tough protein called keratin.