List of practice Questions

The compass is one of the oldest navigational tools we have. Since mankind began to understand more about navigation, compasses have been crucial to the achievement of major feats such as the first transoceanic voyages and the circumnavigation of the globe. None of this would have been possible without the aid of the compass in performing navigation calculations over long distances.
Early explorers had to use local landmarks and the stars to navigate. This made it very difficult to travel to far or unknown destinations. Compasses were one of the key breakthroughs that made such voyages possible. So how exactly does a compass work ?
A compass works by detecting and responding to the Earth’s natural magnetic fields. The Earth has an iron core that is part liquid and part solid crystal, due to gravitational pressure. It is believed that movement in the liquid outer core is what produces the Earth’s magnetic field. Like all such fields, the Earth’s magnetic field has two poles - North and South. These magnetic poles are slightly off from the Earth’s axis of rotation, which is used as the basis of the geographic poles - however the magnetic and geographic poles are close enough to allow a compass to serve as a valuable navigation tool, especially when adjustments are made for the polar differences - such adjustments being referred to as declination.
In September 2019, for the first time in over 360 years, compasses at Greenwich pointed true north. Most of the time, however, compasses don’t actually point precisely towards the North Pole.
True north is the direction that points directly towards the geographic North Pole. This is a fixed point on the Earth’s globe. Magnetic north is quite different : it is the direction that a compass needle points to as it aligns with the Earth’s magnetic field.
The magnetic North Pole shifts and changes over time in response to changes in the Earth’s magnetic core : it isn’t a fixed point.
This difference between true North and the North heading on a compass forms an angle, referred to as declination. Declination varies from place to place because the Earth’s magnetic field is not uniform - it dips and undulates.
The questions are to be answered on the basis of what is stated or implied in the passage. Choose the most appropriate response that accurately and completely answer the question.
Aristotle, an ancient philosopher, was one of the first to discuss syllogisms. In Prior Analytics, published around 350 BCE, Aristotle outlined the basic form of syllogism which represented the earliest branch of formal logic. For Aristotle, logic revolved around deduction : “speech in which certain things having been supposed something different from those supposed results of necessity because of their being so.”
If that sounds confusing – that’s ancient philosophy for you! Let’s break it down. “The things that have been supposed” are what we now call “premises”. “What results necessarily” from those premises being true is a conclusion.
To Aristotle, if an argument was valid, it would be impossible for premises X and Y to be true and for conclusion Z to be false. Aristotle named this method of proving validity “reductio ad impossibile” : a syllogism is valid when the denial of the conclusion but acceptance of the premises would lead to a contradiction.
Aristotle divided syllogistic propositions into four different categories : universal affirmative, particular affirmative, universal negative and particular negative.
A universal affirmative syllogistic sentence : All humans need food.
A particular affirmative syllogistic sentence : Some birds can fly.
A universal negative syllogistic sentence : No dogs are cats.
A particular negative syllogistic sentence : Not all cars have four doors.
During the rise of modern formal logic, German philosopher Gottlob Frege refined Aristotle’s syllogistic theory through the addition of non-categorical syllogisms. These are syllogisms that rely on premises and can be hypothetical, or which include disjunctions like ‘or’. The hypothetical form of syllogisms can be traced back to Stoic philosophy, but modern philosophers tend to attribute the theory to Frege. In the 19th century, British philosopher and economist John Neville Keynes also helped make non-categorical syllogisms popular.
Here’s an example of a hypothetical syllogism :
1. If it is sunny tomorrow, I can go running.
2. It is sunny.
3. Therefore, I can go running.
Here’s an example of a disjunctive syllogism :
1. Patrick studies English or Linguistics.
2. Patrick is not studying Linguistics.
3. Therefore, he is studying English.
In the Begriffsschrift (German for “Concept-Script”), he refined Aristotle’s system by developing a logical system that explained how quantifiers (words like “all” and “some”) work. His system also became the basis for modern computer science.
The questions are to be answered on the basis of what is stated or implied in the passage. Choose the most appropriate response that accurately and completely answer the question.
Within the turbulent past few years, the idea that a person can be “cancelled” — in other words, culturally blocked from having a prominent public platform or career — has become a polarizing topic of debate. The rise of “cancel culture” and the idea of cancelling someone coincides with a familiar pattern: A celebrity or other public figure does or says something offensive; a public backlash, often fuelled by politically progressive social media, ensues. Then come the calls to cancel the person — that is, to effectively end their career or revoke their cultural cachet, whether through boycotts of their work or disciplinary action from an employer.
To many people, this process of publicly calling for accountability, and boycotting if nothing else seems to work, has become an important tool of social justice — a way of combating, through collective action, some of the huge power imbalances that often exist between public figures with far-reaching platforms and audiences, and the people and communities their words and actions may harm.
But conservative politicians and pundits have increasingly embraced the argument that cancel culture, rather than being a way of speaking truth to power, has spun out of control and become a senseless form of social media mob rule. At the 2020 Republican National Convention, for example, numerous speakers, including President Trump, addressed cancel culture directly, and one delegate resolution even explicitly targeted the phenomenon, describing it as having “grown into erasing of history, encouraging lawlessness, muting citizens, and violating free exchange of ideas, thoughts, and speech.”
Actually, ending someone’s career through the power of public backlash is difficult. Few entertainers or other public figures have truly been cancelled — that is, while they may have faced considerable negative criticism and calls to be held accountable for their statements and actions, very few of them have truly experienced career-ending repercussions.
Harry Potter author, J.K. Rowling, for example, has faced intense criticism from her own fans since she began to voice transphobic beliefs, making her one of the most prominently “cancelled” individuals at the centre of the cancel culture debate. But following Rowling’s publication, in June 2020, of a transphobic manifesto, sales of the author’s books actually increased tremendously in her home country of Great Britain.