CBSE Class 4 General Knowledge Brain Teasers Worksheet Set 01

I Fill in the blanks.

Question 1. Industrial revolution first began in _________________________.
Answer: Great Britain (or England)
In simple words: The Industrial Revolution started in Great Britain during the 18th century.

Exam Tip: Remember that Great Britain was the birthplace of modern industrial machinery and factories.

Question 2. Dry Ice is __________________________.
Answer: Solid carbon dioxide
In simple words: Dry ice is the frozen, solid form of carbon dioxide gas.

Exam Tip: Note that dry ice turns directly from a solid into a gas without melting into liquid (sublimation).

Question 3. FIDE deals with ________________________.
Answer: Chess
In simple words: FIDE is the international governing body of the sport of chess.

Exam Tip: Memorize sports acronyms like FIDE (International Chess Federation) as they frequently appear in quizzes.

Question 4. The largest planet in the solar system is ___________________.
Answer: Jupiter
In simple words: Jupiter is a massive gas giant and the biggest planet in our solar system.

Exam Tip: Jupiter is so large that all other planets in the solar system could fit inside it.

Question 5. Khajuraho is located in _________________.
Answer: Madhya Pradesh
In simple words: Khajuraho is a famous town in Madhya Pradesh known for its ancient temples and sculptures.

Exam Tip: Associate Khajuraho with Madhya Pradesh and its UNESCO World Heritage temple architecture.

II See the first three figures carefully. Understand the pattern and complete the following sets

Question 1. See the first three figures carefully. Understand the pattern and complete the following sets (Grid rotation pattern).
Answer: The pattern shows a small black dot moving clockwise around the inner squares of the grid, while the dividing lines rotate. The fourth figure completes the sequence by placing the dot in the top-right inner quadrant with the diagonal lines fully enclosed.
In simple words: Look closely at the position of the dot and rotate it step-by-step clockwise to find the missing box.

Exam Tip: For visual reasoning puzzles, track a single element like a dot or line segment from one box to the next.

Question 2. See the first three figures carefully. Understand the pattern and complete the following sets (Clock hand movement pattern).
Answer: The clock hands advance by a specific time interval (moving forward by 3 hours in each subsequent step: 3:00 to 6:00 to 9:00). The fourth figure shows the clock set to 12:00.
In simple words: The time on the clock moves forward by 3 hours in each step.

Exam Tip: Always check the hour and minute hands separately to determine the exact time difference between figures.

Question 3. See the first three figures carefully. Understand the pattern and complete the following sets (Geometric division pattern).
Answer: The square gains intersecting diagonal and straight cross-lines progressively. The final figure in the set is a square divided by both horizontal, vertical, and both diagonal lines forming an eight-section star pattern.
In simple words: Lines are added inside the square one by one in a fixed sequence.

Question 4. See the first three figures carefully. Understand the pattern and complete the following sets (Dot reflection and translation pattern).
Answer: The dots shift positions across a central vertical axis and increase or alternate sides in each sequential box. The final box mirrors the progression by placing two dots symmetrically across the dividing line.
In simple words: The dots mirror their positions and move across the dividing line in each step.

Exam Tip: Look for symmetry and reflection lines when solving dot-position puzzles.