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Rabia

You have 12 identical-looking balls, but one of them is either heavier or lighter than the rest. You have a balance scale that you can use only three times.

How can you determine which ball is the different one and whether it is heavier or lighter?

Answer:

Here’s how you can determine the odd ball and whether it is heavier or lighter in three weighings:

  1. First Weighing:
    • Divide the 12 balls into three groups of 4 balls each: Group A, Group B, and Group C.
    • Weigh Group A against Group B.

    Scenario 1: If the scales balance, the odd ball is in Group C. Scenario 2: If the scales do not balance, the odd ball is in either Group A or Group B.

  2. Second Weighing:
    • If Scenario 1: Take 3 balls from Group C and weigh them against 3 balls from Group A or B (known normal balls).
      • If they balance, the odd ball is the remaining one in Group C.
      • If they do not balance, the odd ball is among the 3 balls being weighed, and you know whether it’s heavier or lighter.
    • If Scenario 2: Take 2 balls from the heavier side and 2 balls from the lighter side from the first weighing, and swap them with each other (heavier group to lighter side and lighter group to heavier side). Weigh them.
      • If they balance, the odd ball is among the 2 balls not weighed this time from the unbalanced groups.
      • If they do not balance, you can determine if the odd ball is heavier or lighter based on the movement of the scale.
  3. Third Weighing:
    • If you narrowed it down to 3 balls, take 2 of them and weigh them against each other.
      • If they balance, the odd ball is the remaining one.
      • If they do not balance, you can determine which one is the odd ball and whether it is heavier or lighter based on the known imbalance.

By following these steps, you can identify the odd ball and determine if it is heavier or lighter within three weighings.

In a small town, there are five houses in a row, each painted a different color. Each house is occupied by a person of a different nationality. Each homeowner drinks a different beverage, smokes a different brand of cigar, and keeps a different pet.

Here are some additional clues:

  1. The Brit lives in the red house.
  2. The Swede keeps dogs as pets.
  3. The Dane drinks tea.
  4. The green house is immediately to the left of the white house.
  5. The green house’s owner drinks coffee.
  6. The person who smokes Pall Mall rears birds.
  7. The owner of the yellow house smokes Dunhill.
  8. The man living in the center house drinks milk.
  9. The Norwegian lives in the first house.
  10. The man who smokes Blends lives next to the one who keeps cats.
  11. The man who keeps horses lives next to the man who smokes Dunhill.
  12. The man who smokes Blue Master drinks beer.
  13. The German smokes Prince.
  14. The Norwegian lives next to the blue house.
  15. The man who smokes Blends has a neighbor who drinks water.

The question is: Who owns the fish?

Answer:

The German owns the fish.

Here’s how the clues fit together:

  1. The Norwegian lives in the first house.
  2. The house next to the Norwegian is blue.
  3. The man in the center house drinks milk.
  4. The green house is immediately to the left of the white house.
  5. The green house’s owner drinks coffee.
  6. The Brit lives in the red house.
  7. The yellow house is next to the blue house and the Norwegian lives in the yellow house.
  8. The German lives in the green house and drinks coffee.
  9. The person who smokes Pall Mall has birds.
  10. The person who smokes Dunhill lives in the yellow house.
  11. The man who keeps horses lives next to the man who smokes Dunhill.
  12. The Swede keeps dogs.
  13. The Dane drinks tea.
  14. The German smokes Prince.
  15. The person who smokes Blends lives next to the person who keeps cats.
  16. The person who smokes Blends has a neighbor who drinks water.
  17. The person who smokes Blue Master drinks beer.

When all these clues are arranged systematically, it turns out that the German, who lives in the green house, is the one who owns the fish.

What is the goal of AI governance?

A. To ensure the ethical use of AI
B. To increase the speed of AI development
C. To promote AI research
D. To integrate AI in all sectors

Option: A

What is the focus of explainable AI?

A. To make AI decisions understandable by humans
B. To improve the speed of AI algorithms
C. To increase the accuracy of AI models
D. To reduce the cost of AI implementation

Option: A