Lightning-Fast Doubt Resolution

A, B, C and D are 4 persons from 4 different continents Asia, Europe, Africa and Australia. Also, each one of them speaks a different language among Spanish, Italian, French and German. Each of the 4 people belongs to one of the 3 categories - Truth-teller, Liar and Alterntor. A truth-teller always speaks the truth, a liar always lies and an alternator alternates between a truth and a lie. It is known that there is at least one liar. Each of the 4 people states 3 sentences each, as follows:

A:

1. D does not always speak the truth.

2. B knows French.

3. C is from Australia.

B:

1. A is a liar.

2. I do not always speak the truth.

3. I know French.

C:

1. D is not from Europe.

2. A does not know Spanish.

3. A is not from Asia.

D:

1. I speak French.

2. There is only one liar.

3. B is from Asia.

Based on the information given above, answer the questions that follow.

Read the passage and answer the following questions:

At a particular 400-year-old Buddhist temple, visitors can stroll through peaceful stone gardens, sit for a quiet cup of tea, and receive Buddhist teachings from an unusual priest: an android named Mindar. It has a serene face and neutral appearance, neither old nor young, male nor female. Beyond the realistic skin covering its head and upper torso, it looks unfinished and industrial, with exposed tubes and machinery. But Mindar is philosophically quite sophisticated, discoursing on an abstruse Buddhist text called the Heart Sutra.

If you had to figure out where you could find this robotic priest, you might need only one guess to conclude it’s in Japan, at the beautiful Kodai-Ji Temple in Kyoto. Japan has long been known as a nation that builds and bonds with humanoid robots more enthusiastically than any other. While this reputation is often exaggerated abroad - Japanese homes and businesses are not densely populated by androids, as hyperventilating headlines imply - there is something to it.

Some observers of Japanese society say that the country’s indigenous religion, Shinto, explains its fondness for robots. Shinto is a form of animism that attributes spirits, or kami, not only to humans but to animals, natural features like mountains, and even quotidian objects like pencils. “All things have a bit of soul,” in the words of Bungen Oi, the head priest of a Buddhist temple that held funerals for robotic companion dogs.
According to this view, there is no categorical distinction between humans, animals, and objects, so it is not so strange for a robot to demonstrate human-like behaviours - it’s just showing its particular kind of kami. “For Japanese, we can always see a deity inside an object,” says Kohei Ogawa, Mindar’s lead designer.
Japan’s animism stands in contrast with the philosophical traditions of the West. Ancient Greeks were animistic in that they saw spirits in natural places like streams, but they thought of the human soul and mind as distinctly separate from and above the rest of nature.
The Abrahamic religions put humans on an even higher pedestal, as God’s greatest creation, the only vessels containing immortal souls. Ancient Israelites were sternly warned against imputing too much specialness in objects, lest they verge into idol worship, a form of heresy expressly forbidden by the Ten Commandments. Some forms of Islam are especially averse to idolatry and prohibit creating even any images of humans or animals.

According to the traditional Western view, a machine that acts like a person is violating natural boundaries, dangerously conflating the sacred and profane. This ethical warning shows up prominently in modern myths about technology, such as Frankenstein, which derives much of its moral message from the Bible, says Christopher Simons, a professor of comparative culture at the International Christian University in Tokyo.

Seven students stay in a 7-storeyed building, one student on each floor. Each student studies a different subject and has a different ID. The following information is known:

Sachin lives on the first floor.
The person on the third floor has ID 20.
The first floor guy studies Maths.
Anil studies Chemistry.
Sehwag lives on the 3rd floor.
The person with ID 40 and Sehwag live on consecutive floors.
The person who studies Maths has ID 10.
The person with ID 20 studies Physics.
The person on the second floor has ID 30.
Laxman lives on the seventh floor.
Rahul has ID number 70.
Saurav studies Biology.
Srinath has ID number 50.
Saurav lives on the second floor.
The person with ID number 60 lives on the seventh floor.
Laxman studies Geography.
The person with ID 50 lives on the 6th floor.
The person with ID 30 studies Biology.
The person with ID 70 studies History.
Srinath studies English.
The person with ID 40 studies Chemistry.
The person who studies History lives on the 5th floor.
Anil lives on the 4th floor.
 

Seven students stay in a 7-storeyed building, one student on each floor. Each student studies a different subject and has a different ID. The following information is known:

Sachin lives on the first floor.
The person on the third floor has ID 20.
The first floor guy studies Maths.
Anil studies Chemistry.
Sehwag lives on the 3rd floor.
The person with ID 40 and Sehwag live on consecutive floors.
The person who studies Maths has ID 10.
The person with ID 20 studies Physics.
The person on the second floor has ID 30.
Laxman lives on the seventh floor.
Rahul has ID number 70.
Saurav studies Biology.
Srinath has ID number 50.
Saurav lives on the second floor.
The person with ID number 60 lives on the seventh floor.
Laxman studies Geography.
The person with ID 50 lives on the 6th floor.
The person with ID 30 studies Biology.
The person with ID 70 studies History.
Srinath studies English.
The person with ID 40 studies Chemistry.
The person who studies History lives on the 5th floor.
Anil lives on the 4th floor.
 

Siddharth, a drug kingpin, has 5 equally spaced underground tanks in his backyard, forming a line. At a time he uses one of these 5 underground tanks to hide his drugs and money from law enforcement agency. Krishna is a DEA agent who aims to catch Siddharth along with drugs to free the city from the drugs. However, due to the influence of Siddharth on the local court, Krishna has gotten permission to search only 1 tank a day. Krishna knows the following things

a) Siddharth shifts his drugs every day

b) The contents of the occupied tank can be shifted to one of its adjacent tanks only

Apart from being a good DEA agent, Krishna is also good at logic. Before beginning the search, he makes a random assumption on day 1 whether the drugs are in an odd-numbered or even-numbered tank and checks one of them. Day 2 onwards he uses the finding of previous days to deduce which tank to check to ensure he catches Siddharth in a minimum number of days possible. Until and unless proven wrong, Krishna will not change the assumption made on day 1