Maths
IGCSE English
Sciences
Riddles
Business/Economics
100

The Pizza Party Problem: Amy is having a pizza party, and she orders 8 pizzas. Each pizza is divided into 6 equal slices. If there are 12 people at the party, how many slices of pizza will each person get?

The Pizza Party Problem: Amy will have 8 pizzas * 6 slices each = 48 slices in total. She can give 48 slices / 12 people = 4 slices per person. 

100

What literary device is used when an author gives human characteristics to non-human entities, such as animals or objects?

Personification 

100

 In the electromagnetic spectrum, which type of wave has the shortest wavelength?

 In the electromagnetic spectrum, gamma rays have the shortest wavelength.

100

I'm not alive, but I can grow; I don't have lungs, but I need air; I don't have a mouth, but water kills me. What am I?

Fire

100

 What does GAAP stand for in accounting, and why is it important for businesses?

 GAAP stands for Generally Accepted Accounting Principles, which are a set of standardized accounting principles, standards, and procedures used by companies to prepare and present their financial statements. It is important for ensuring consistency and comparability in financial reporting.

200

The Water Tank Problem: A cylindrical water tank has a radius of 4 feet and a height of 10 feet. Calculate the volume of water (in cubic feet) the tank can hold when it's full.

The Water Tank Problem: The volume of a cylinder is given by the formula V = π * r^2 * h, where π (pi) is approximately 3.14159. Plugging in the values, V = 3.14159 * (4 feet)^2 * 10 feet = 502.65 cubic feet (rounded to two decimal places).

200

What are the three rhetorical appeals used in persuasive writing and speeches, as defined by Aristotle?

The three rhetorical appeals used in persuasive writing and speeches, as defined by Aristotle, are ethos (credibility), pathos (emotion), and logos (logic).

200

 What are the five main kingdoms in the classification of living organisms?

The five main kingdoms in the classification of living organisms are Animalia, Plantae, Fungi, Protista, and Monera (or Bacteria).

200

I am not alive, but I can grow; I don't have lungs, but I need air; I don't have a mouth, but I can drown. What am I?  

A Balloon
200

 In financial statements, what is the formula for calculating net profit or net income?

In financial statements, the formula for calculating net profit or net income is: Net Profit = Total Revenue - Total Expenses.

300

The Sine Law Problem: In a triangle ABC, angle A is 45 degrees, angle B is 60 degrees, and side b is 8 meters long. Calculate the length of side a using the sine law.

6.53 meters  

300

 How does varying sentence structure, such as using simple, compound, and complex sentences, impact the flow and style of a piece of writing?

 Varying sentence structure impacts the flow and style of a piece of writing by adding variety and rhythm. Simple sentences are concise, compound sentences provide balance, and complex sentences allow for more detail and complexity in the narrative

300

Explain the difference between an element and a compound. Provide examples of each.

An element is a pure substance composed of only one type of atom. Elements cannot be broken down into simpler substances by chemical reactions. Examples of elements include oxygen (O2), hydrogen (H2), and carbon (C).

A compound, on the other hand, is a substance composed of two or more different elements chemically bonded together in fixed ratios. Compounds can be broken down into their constituent elements through chemical reactions. An example of a compound is water (H2O), which consists of hydrogen and oxygen atoms bonded together.

300

Three people are each wearing a hat. They can't see the color of their own hat, but they can see the colors of the other two hats. The hats come in three colors: red, blue, and green. They are told that at least one of them is wearing a red hat, and at least one of them is wearing a blue hat. They are asked if anyone knows the color of their own hat. After a moment of silence, one of them confidently says the color of their hat. Who says it, and what is the color of their hat?

The person who confidently says the color of their own hat is the one who sees two hats of different colors on the other two people. Let's assume the hats are Red (R), Blue (B), and Green (G). If the person sees a Red hat and a Blue hat on the other two, they know their hat must be Green (G).

300

 What economic term describes the maximum price that consumers are willing to pay for a product, which is determined by the intersection of supply and demand?

The economic term that describes the maximum price that consumers are willing to pay for a product, determined by the intersection of supply and demand, is known as the equilibrium price.

400

The Mixing Problem: A chemist has a solution that is 40% acid. How many liters of this solution must be mixed with 20 liters of a 25% acid solution to obtain a mixture that is 30% acid?

The Mixing Problem: Let x be the amount of the 40% solution to mix with 20 liters of the 25% solution. The equation to solve is: 0.40x+0.25(20)=0.30(x+20)0.40x+0.25(20)=0.30(x+20)

Solve for x to find that you need to mix 40 liters of the 40% solution.

400

"As the storm raged on outside, inside the cozy cabin, we debated whether to venture out into the tempest, it's a decision that will test our resolve." 

Correct the sentence.

"As the storm raged on outside the cozy cabin, we debated whether to venture out into the tempest. It's a decision that will test our resolve."

400

What term describes the genetic makeup of an organism, representing its genes?

The genetic makeup of an organism, representing its genes, is referred to as its genotype.

400

Three people check into a hotel room that costs $30. They each contribute $10, handing $30 to the hotel clerk. Later, the hotel clerk realizes there was a mistake, and the room only costs $25. The hotel clerk gives $5 to the bellboy and asks him to return it to the guests. However, the bellboy decides to keep $2 for himself and gives $1 back to each guest. Now, each guest has paid $9 (a total of $27), and the bellboy has $2. What happened to the missing dollar?

Can you figure out what happened to the missing dollar in this situation?

The missing dollar is actually a result of a bit of misdirection in the way the question is framed. Here's how the money was accounted for:


1. The guests originally paid a total of $30.

2. The hotel clerk returned $5 to the bellboy, which reduces the amount paid by the guests to $25.

3. The bellboy kept $2 for himself, so the hotel received $25 - $2 = $23.


The guests still have $1 from the money returned to them, and the bellboy has $2. When you add the guests' $1 and the bellboy's $2, it totals $3, which is the difference between the $23 received by the hotel and the original $30 paid by the guests.


So, there's no missing dollar; the accounting simply shows the distribution of the money.

400

How is opportunity cost defined in economics, and why is it an important concept for decision-making?

 Opportunity cost in economics refers to the value of the next best alternative that must be forgone when a decision is made. It is important because it helps individuals and businesses make informed choices when allocating resources.

500

The Tricky Sequence Problem:

Consider the following sequence:

1, 11, 21, 1211, 111221, 312211, ...

Can you figure out the next term in the sequence? If so, what is it, and can you explain the pattern?

This sequence is generated using a pattern of describing the previous term. It's a "look-and-say" sequence.

Starting with 1, each subsequent term is created by describing the previous term in terms of consecutive digits. So, let's break it down:

  • The first term is simply 1.
  • The second term describes the first term as "one 1," so it becomes 11.
  • The third term describes the second term as "two 1s," so it becomes 21.
  • The fourth term describes the third term as "one 2, then one 1," so it becomes 1211.
  • The fifth term describes the fourth term as "one 1, then one 2, then two 1s," so it becomes 111221.
  • And so on...

To find the next term:

  • The sixth term describes the fifth term as "three 1s, then two 2s, then one 1," so it becomes 312211.

So, the next term in the sequence is 312211. This pattern continues as you describe the previous term to generate the next one. It's a fascinating example of a recursive sequence in mathematics.

500

"As the crimson sun dipped below the horizon, casting long, ethereal shadows across the tranquil meadow, the chirping of crickets and the gentle rustle of leaves formed a harmonious symphony of nature, inviting us to ponder the fleeting beauty of life's twilight moments."

This sentence uses 5 literary devices, name them.

  • Imagery is used to create a vivid mental picture of the setting and atmosphere.
  • Metaphor is used with "the crimson sun" to compare the sun to the color crimson.
  • Alliteration is present with "casting," "crimson," and "casting" starting with the same consonant sound.
  • Personification is used with "the chirping of crickets" and "the gentle rustle of leaves" by giving human attributes to non-human elements.
  • Symbolism is implied in "the fleeting beauty of life's twilight moments," where twilight symbolizes the transience of life.
500

What type of immune cells are responsible for producing antibodies, and what is the primary function of antibodies in the immune system?

B cells are responsible for producing antibodies, and antibodies (also known as immunoglobulins) play a key role in binding to and neutralizing pathogens like bacteria and viruses.

500

Problem: The Frog and the Well

A frog fell into a well that was 30 feet deep. During the day, the frog could jump 3 feet up but slid back 2 feet down each night while it slept. How many days did it take for the frog to get out of the well?

Give it a try and see if you can figure out how many days it took for the frog to escape the well!

28 days


500

Market Structures: What are the four main types of market structures, and how do they differ in terms of competition and pricing power?

The four main types of market structures are perfect competition, monopolistic competition, oligopoly, and monopoly