Your Answer : (Not Answered)

Correct Answer : B

Let the time taken by A and B together be x hours. Then A takes x+27 hours and B takes x+3 hours. Their combined one hour's work is \(\frac{1}{x+27} + \frac{1}{x+3} = \frac{1}{x}\). This gives \(x(x+3+x+27) = (x+27)(x+3) \Rightarrow x(2x+30) = x^2+30x+81 \Rightarrow 2x^2+30x = x^2+30x+81 \Rightarrow x^2=81 \Rightarrow x=9\). Time taken by A alone = x+27 = 9+27 = 36 hours.

Your Answer : (Not Answered)

Correct Answer : D

The two choices are independent, so they multiply.

\[ 9 \times 12 = 108 \]

Each of the nine trousers can be paired with each of the twelve shirts. Adding them would answer a different question - how many garments he could pick one of.

Your Answer : (Not Answered)

Correct Answer : C

Volume of a cylinder is \( \pi r^{2}h \), so form the ratio with the \( \pi \) cancelling.

\[ \frac{V_{1}}{V_{2}} = \frac{r_{1}^{2}h_{1}}{r_{2}^{2}h_{2}} = \frac{4^{2} \times 21}{7^{2} \times 8} \]

\[ = \frac{16 \times 21}{49 \times 8} = \frac{336}{392} = \frac{6}{7} \]

So the ratio is \( 6 : 7 \). The radii enter squared and the heights only to the first power - treating both alike gives \( 84 : 56 = 3 : 2 \), which is the last distractor.

Your Answer : (Not Answered)

Correct Answer : A

Let the son's present age be  \(x\) years .

Then,   \( (38 - x) = x \) 

\(=> x= 19\)

Son's age 5 years back =  (19-5) =  14 yeara

Your Answer : (Not Answered)

Correct Answer : C

Correct answer: Either I or III is true

Translating: T > K, K ≤ R, R = M, so M = R ≥ K. That gives either M = K or M > K, which are conclusions I and III forming a complementary pair. Conclusion II asks how M compares with T, and the chain reverses at K, so nothing follows.

Your Answer : (Not Answered)

Correct Answer : A

Statement (I) is the cause and statement (II) is the effect. If the price of tea increases, people who find it too costly tend to switch to a cheaper substitute such as coffee, so more coffee is drunk. The reverse does not hold: more coffee drinking would lower the demand for tea and would not push its price up. The two statements are linked and are not independent effects, and there is no third common cause that is suggested by them. So the first option is right.

Your Answer : (Not Answered)

Correct Answer : C

Ink is the material a pen uses to make its mark, so the second word names what the first thing writes with. A pencil makes its mark with lead (graphite), so lead is the word that completes the relation. Paper is what both instruments write on, not what they write with, write is what both of them do, and an eraser is used to remove a pencil mark rather than to make one. The answer is Lead, option (C). Analogy questions are solved by stating the relation in one sentence, here 'the first is a writing instrument and the second is what it writes with', and applying the same sentence to the third word.

Your Answer : (Not Answered)

Correct Answer : C

Correct answer: Waller

“Nightwalker” contains only one L, and “Waller” needs two, so it cannot be formed. The other three all can: talker, tailer and winer each draw a letter at most as many times as it appears. Counting the repeated letters of the source word first - here just one each of everything - is the quickest way through this type.

Your Answer : (Not Answered)

Correct Answer : D

Correct answer: Patients

The question asks what is always present, not what usually is. A hospital is an institution for the care of the sick, so patients are what make it one. An operating theatre belongs to hospitals that perform surgery, and many - a convalescent hospital, a small clinic-hospital - do not. An ambulance is a vehicle for bringing patients in and is owned by services rather than always by the hospital. A canteen is an amenity, not a defining feature.

Your Answer : (Not Answered)

Correct Answer : A

Nathu La is in Sikkim.

Nathu La is a mountain pass at about 4,300 m on the border between Sikkim and the Tibet region of China, on an old branch of the Silk Road. It is a border trade point and the route for the Kailash Mansarovar Yatra through Sikkim.

Arunachal Pradesh has its own passes such as Bum La, while Meghalaya and Nagaland do not border China.

The pass was closed for trade after the 1962 war and reopened for border trade in 2006, and it is now also a tourist destination open to visitors with permits.

Your Answer : (Not Answered)

Correct Answer : D

The date is 24 August 2017.

On 24 August 2017, in Justice K. S. Puttaswamy v. Union of India, a nine-judge bench of the Supreme Court unanimously held that the right to privacy is a fundamental right under Article 21.

The 2010 dates and 11 August 2017 are not the date of the judgment.

The judgment overruled the earlier decisions in M. P. Sharma and Kharak Singh, which had denied that privacy was a fundamental right. The court held that privacy is part of the right to life and personal liberty under Article 21 and of the freedoms in Part III as a whole. The date of the judgment is 24 August 2017.

Your Answer : (Not Answered)

Correct Answer : D

It is Azerbaijani.

Azerbaijani is a Turkic language, close to Turkish, and has been written in the Latin alphabet since 1991 after periods in Arabic and Cyrillic script.

Your Answer : (Not Answered)

Correct Answer : B

Carbon monoxide acts on the bloodstream and can kill.

It binds to haemoglobin about 240 times more strongly than oxygen does, forming carboxyhaemoglobin, so the blood can no longer carry oxygen. Being colourless and odourless it gives no warning.

Your Answer : (Not Answered)

Correct Answer : D

Gaurika Singh of Nepal, aged 13, was the youngest competitor at the Rio Olympics in 2016, swimming the 100 m backstroke.

She had survived the 2015 Nepal earthquake the year before.

Your Answer : (Not Answered)

Correct Answer : B

IP stands for Internet Protocol.

It addresses and routes packets between networks. It is connectionless and makes no guarantee of delivery; TCP above it provides the reliability.

Your Answer : (Not Answered)

Correct Answer : A

Barbed wire was patented in 1874.

Joseph Glidden of De Kalb, Illinois, patented the design that prevailed. Cheap fencing transformed the American West, ending the open range and the long cattle drives within a decade.

Your Answer : (Not Answered)

Correct Answer : C

Digestion is completed in the small intestine.

Pancreatic and intestinal enzymes finish breaking carbohydrates into monosaccharides, proteins into amino acids and fats, emulsified by bile, into fatty acids and glycerol. The products are absorbed through the villi lining the same stretch of gut.

Your Answer : (Not Answered)

Correct Answer : C

Minorities Rights Day is observed in India on 18 December.

The date marks the UN's adoption in 1992 of the Declaration on the Rights of Persons Belonging to National or Ethnic, Religious and Linguistic Minorities. India's National Commission for Minorities observes it.

Your Answer : (Not Answered)

Correct Answer : B

Correct answer: 24

The world is conventionally divided into 24 standard time zones, one for each hour of the day, since the Earth turns 360° in 24 hours and so 15° per hour. The convention is neater than the practice. Many countries offset their clocks by half an hour or even 45 minutes - India at UTC+5:30, Nepal at UTC+5:45, parts of Australia at UTC+9:30 - so the actual count of distinct offsets in use is around 38. Political convenience also overrides geography. China spans five geographic zones but keeps a single time nationwide, while Russia uses eleven. Zone boundaries follow national and provincial borders rather than meridians, so they are highly irregular. India adopted a single zone based on the 82.5°E meridian near Mirzapur, which means the sun rises in Arunachal Pradesh nearly two hours before it does in Gujarat - a recurring argument for a second Indian zone.

Your Answer : (Not Answered)

Correct Answer : A

Deep oceanic trenches are produced by plate tectonics, specifically at subduction zones where one plate bends downwards beneath another. The Mariana Trench, nearly 11,000 m deep, is the deepest.

Sea-floor spreading is the complementary process at mid-ocean ridges, where crust is created rather than consumed, so it builds ridges rather than trenches.