CBSE Class 4 General Knowledge Brain Teasers Worksheet Set 03

Question 1. Industrial revolution first began in _________________________.
Answer: England (or Britain, Great Britain)
In simple words: The Industrial Revolution started in England in the 18th century and then spread to other countries.

Exam Tip: The Industrial Revolution marked the shift from agricultural to industrial economies, beginning around 1760 in England.

Question 2. Dry Ice is __________________________.
Answer: Solid carbon dioxide (CO₂) or frozen carbon dioxide
In simple words: Dry ice is the solid form of carbon dioxide gas, much colder than regular ice.

Exam Tip: Dry ice is at -78.5°C and is used for cooling and in special effects due to its white fog.

Question 3. FIDE deals with ________________________.
Answer: Chess
In simple words: FIDE (Fédération Internationale des Échecs) is the international governing body for chess.

Exam Tip: FIDE organizes world chess championships and regulates chess competitions globally.

Question 4. The largest planet in the solar system is ___________________.
Answer: Jupiter
In simple words: Jupiter is by far the largest planet in our solar system, much bigger than Earth.

Exam Tip: Jupiter is a gas giant with a mass of about 318 Earth masses and has more than 79 moons.

Question 5. Khajuraho is located in _________________.
Answer: Madhya Pradesh (India)
In simple words: Khajuraho is an ancient temple complex in Madhya Pradesh, famous for its architectural and sculptural art.

Exam Tip: Khajuraho temples were built during the Chandella dynasty (10th-11th century) and are a UNESCO World Heritage Site.

Section II: Pattern Recognition (Figures)
Note: Questions 1-4 in Section II contain visual patterns/figures that cannot be identified from text alone. To complete these pattern recognition questions, you will need to:

1. Carefully observe the first three figures in each set
2. Identify the pattern (such as rotation, size change, position change, shape transformation, etc.)
3. Apply the same pattern to complete the fourth figure

Common pattern types in brain teasers include:
- Rotation patterns (figures turning at certain angles)
- Size variations (getting larger or smaller)
- Position changes (moving within a space)
- Shape transformations (changing from one shape to another)
- Color or shading patterns
- Symmetry patterns

In simple words: These are visual logic puzzles where you need to find what changes in each step and apply the same change to find the missing figure.

Exam Tip: For pattern recognition, always look for what changes between figures: size, rotation, position, color, number of elements, or shape transformation. Try to describe the change in words, then apply it to the next step.