World History
Science
Mathematics
Geography
Logic & Reasoning
100

Which 1453 event is conventionally regarded as marking the end of the Byzantine Empire and the beginning of the Ottoman Empire's dominance in southeastern Europe?

The Fall of Constantinople

  • Hint 1: It happened in the 15th century.
  • Hint 2: The city was the capital of the Byzantine Empire.
  • Hint 3: The Ottoman ruler responsible was Mehmed II.
100

What law of thermodynamics states that the entropy of an isolated system cannot decrease?

The Second Law of Thermodynamics

  • Hint 1: It is one of the four fundamental laws of thermodynamics.
  • Hint 2: It explains why many natural processes have a preferred direction in time.
  • Hint 3: The key concept is entropy.
100

What is the next number in the sequence: 2, 6, 12, 20, 30, ?

42

  • Hint 1: Look at the differences between consecutive numbers.
  • Hint 2: The differences are 4, 6, 8, 10...
  • Hint 3: The next difference is 12.
100

What is the largest lake in the world by surface area?

  • Hint 1: Despite being called a sea, it is technically a lake.
  • Hint 2: It lies between Europe and Asia.
  • Hint 3: Several countries border it, including Russia, Iran, and Kazakhstan.

Answer: The Caspian Sea

100

Question: A man has four daughters. Each daughter has one brother. How many children does the man have?


5

200

 Which Chinese dynasty, founded by Zhu Yuanzhang in 1368, expelled the Mongol Yuan dynasty and later sponsored Zheng He's famous maritime expeditions?  

Ming Dynasty

  • Hint 1: This dynasty followed Mongol rule in China.
  • Hint 2: Its founder was originally a peasant who became a military leader.
  • Hint 3: Zheng He conducted his voyages under this dynasty.
200

In molecular biology, what enzyme synthesizes RNA from a DNA template during transcription? 

RNA Polymerase

  • Hint 1: The question concerns transcription.
  • Hint 2: It creates an RNA molecule.
  • Hint 3: It reads a DNA template.
200

A triangle has side lengths 3, 4, and 5. What is the area of the triangle?

6

  • Hint 1: This is a famous Pythagorean triple.
  • Hint 2: The 3 and 4 sides are perpendicular.
  • Hint 3: Use A=1/2bh.
200

 Which country is home to the Atacama Desert, one of the driest places on Earth?

  • Hint 1: It is on the western coast of South America.
  • Hint 2: It is a long, narrow country between the Andes and the Pacific Ocean.
  • Hint 3: Its capital is Santiago.

Answer: Chile

200

A bat and a ball cost $1.10 together. The bat costs $1 more than the ball. How much does the ball cost?

5 cents

300

 The 1884–85 conference that formalized European rules for the colonization of Africa was hosted by which German chancellor?

 Otto von Bismarck

  • Hint 1: The event took place in the 19th century.
  • Hint 2: It concerned the European partition of Africa.
  • Hint 3: The conference was held in Berlin.
300

Which part of the brain is primarily responsible for forming new long-term memories?

  • Hint 1: It is part of the limbic system.
  • Hint 2: Damage to this structure can cause severe difficulty forming new memories.
  • Hint 3: Its name comes from the Greek word for “seahorse.”

Answer: Hippocampus

300

9-3÷1/3+1

1

300

 Which African country is home to Mount Kilimanjaro, the highest mountain in Africa?

  • Hint 1: It is in East Africa.
  • Hint 2: It borders Kenya to the north.
  • Hint 3: Its largest city is Dar es Salaam.

Answer: Tanzania

300

A room contains 10 people. Everyone shakes hands with everyone else exactly once. How many handshakes occur?

45

400

 Which 16th-century Ottoman sultan is best known for expanding the empire into Central Europe, capturing much of the Middle East, and overseeing the Ottoman Empire during its cultural and political peak?

  • Hint 1: He ruled for more than 40 years during the 1500s.
  • Hint 2: His forces famously besieged Vienna in 1529.
  • Hint 3: He is known in the West as “the Magnificent.”

Answer: Suleiman the Magnificent

400

 A ball is dropped from a height of 20 meters. Ignoring air resistance, approximately how fast is it moving just before it hits the ground? Use g≈10 m/s2.

  • Hint 1: Use the equation v2=2gh.
  • Hint 2: Substitute g=10 and h=20.
  • Hint 3: You get v2=400. Take the square root.

Answer: 20 m/s

400

 A fair six-sided die is rolled twice. What is the probability that the two numbers add up to 8?

5/36

  • Hint 1: There are 36 equally likely pairs.
  • Hint 2: List the pairs that total 8.
  • Hint 3: There are five: (2,6), (3,5), (4,4), (5,3), and (6,2).
400

 Which country has the most islands in the world, with hundreds of thousands of islands and islets?

  • Hint 1: It is located in Northern Europe.
  • Hint 2: Its capital is Stockholm.
  • Hint 3: It is famous for its extensive archipelagos and thousands of coastal islands.

Answer: Sweden


400

Question: What number should replace the question mark?

1, 11, 21, 1211, 111221, ?

  • Hint 1: Don't try to find a mathematical operation between the numbers.
  • Hint 2: Say each number out loud and describe what you see.
  • Hint 3: The first term is “one 1,” the next is “two 1s,” then “one 2, one 1.”

Answer: 312211

500

During World War II, which countries were the three principal Axis powers, and which countries were the three principal Allied powers?  

  • Hint 1: The Axis powers were led by Germany, Italy, and an East Asian empire.
  • Hint 2: The principal Allied powers included the countries led by Churchill, Roosevelt, and Stalin.
  • Hint 3: The East Asian Axis power was Japan, while the three principal Allied powers were the United Kingdom, United States, and Soviet Union.

Answer:
Axis: Germany, Italy, and Japan
Allies: United Kingdom, United States, and Soviet Union

500

When hydrochloric acid (HCl) reacts with sodium hydroxide (NaOH), what are the two products formed?


    • Hint 1: This is a classic acid-base neutralization reaction.
    • Hint 2: The hydrogen ion from the acid reacts with the hydroxide ion from the base to form water.
    • Hint 3: The remaining ions form a common crystalline compound used as table salt.
  1. Answer: Water (H₂O) and sodium chloride (NaCl).

500

 What is the sum of the first 100 positive integers?

5,050

  • Hint 1: There is a famous formula for 1+2+3+⋯+n.
  • Hint 2: The formula is n(n+1)/2.
  • Hint 3: Substitute n=100.
500

What is the only country in the world that is located in all four hemispheres?

  • Hint 1: It is an island nation in the Pacific Ocean.
  • Hint 2: The country consists of many islands spread across the equator and the 180th meridian.
  • Hint 3: Its capital is Majuro.

Answer: The Marshall Islands

500

In how many different ways can 5 people sit around a circular table if rotations of the same arrangement are considered identical?

  • Hint 1: This is a circular permutation problem.
  • Hint 2: For n distinct people around a circle, the formula is (n−1)!.
  • Hint 3: Calculate 4!.

Answer: 24

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