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If a bicycle is traveling at 20 km/h and the wind is blowing at 5 km/h in the same direction, what is the effective speed of the bicycle?
A. 15 km/h
B. 20 km/h
C. 25 km/h
D. 30 km/h
Correct Answer: C The effective speed of the bicycle is the sum of its speed and the wind speed, so the effective speed is 20 + 5 = 25 km/h.
Q2. [+2, -0.25]General Knowledge
Which city is the capital of Australia?
A. Sydney
B. Melbourne
C. Canberra
D. Perth
Correct Answer: C Canberra is the capital city of Australia, located in the Australian Capital Territory.
Q3. [+2, -0.25]Reasoning
If a person has 5 hats of different colors and wants to wear 2 hats at a time, how many different combinations of hats can the person wear?
A. 10
B. 12
C. 15
D. 20
Correct Answer: A The person can wear any of the 5 hats as the first hat, and for each of these, they can wear any of the remaining 4 hats as the second hat. However, this counts each combination twice (e.g., wearing hat A and then hat B is the same as wearing hat B and then hat A), so we divide by 2 to get the total number of combinations: (5 * 4) / 2 = 20 / 2 = 10.
Q4. [+2, -0.25]General Knowledge
Who was the first Prime Minister of India?
A. Jawaharlal Nehru
B. Subhas Chandra Bose
C. Mahatma Gandhi
D. Dr. Rajendra Prasad
Correct Answer: A Jawaharlal Nehru was the first Prime Minister of India, serving from 1947 to 1964.
Q5. [+2, -0.25]Science
What is the process by which water moves through a plant, from the roots to the leaves?
A. Respiration
B. Transpiration
C. Photosynthesis
D. Evaporation
Correct Answer: B Transpiration is the process by which water moves through a plant, from the roots to the leaves, and is then released into the air as water vapor.
Q6. [+2, -0.25]Mathematics
The radius of a circle is 7 cm. What is its circumference? (Take pi = 22/7)
A. 22 cm
B. 44 cm
C. 14 cm
D. 88 cm
Correct Answer: B Step 1: Recall the formula for circumference: C = 2pir (where r = radius).
Step 2: Substitute values: r = 7, pi = 22/7.
C = 2 x (22/7) x 7 = 2 x 22 = 44 cm.
Shortcut Trick: When r is a multiple of 7, 22/7 cancels beautifully. 2 x (22/7) x 7 = 2 x 22 = 44. The 7 in denominator and numerator cancel out - just multiply 2 x 22 directly! No need to do long calculations.
Formula Memory Aid: 'C = pid' (circumference = pi x diameter). Since d = 2r = 14 cm, C = (22/7) x 14 = 22 x 2 = 44 cm. This is even faster!
Common Mistake: Students use the area formula (pir^2) instead of circumference and get 154 cm^2. Check: Circumference is length (cm), area is square units (cm^2). The question asks for circumference - use 2pir, not pir^2.
Q7. [+2, -0.25]General Knowledge
In the Indian Olympic Games 2024, which sport did India win its first gold medal in?
A. Archery
B. Badminton
C. Boxing
D. Weightlifting
Correct Answer: C India secured its first gold in boxing at the 2024 Indian Olympic Games, marking a historic achievement.
Q8. [+2, -0.25]Science
What is the process by which plants make their own food?
A. Respiration
B. Photosynthesis
C. Decomposition
D. Fermentation
Correct Answer: B Photosynthesis is the process by which plants, algae, and some bacteria convert light energy from the sun into chemical energy in the form of organic compounds, such as glucose.
Q9. [+2, -0.25]General Knowledge
Which river is the longest in India?
A. Ganga
B. Brahmaputra
C. Yamuna
D. Godavari
Correct Answer: A The Ganga is the longest river in India, stretching approximately 2,525 kilometers from its source in the Himalayas to its delta in the Bay of Bengal.
Q10. [+2, -0.25]Reasoning
If it takes 5 machines 5 minutes to make 5 widgets, how long would it take 100 machines to make 100 widgets?
A. 5 minutes
B. 10 minutes
C. 20 minutes
D. 50 minutes
Correct Answer: A If 5 machines can make 5 widgets in 5 minutes, then 1 machine can make 1 widget in 5 minutes. Therefore, 100 machines can make 100 widgets in 5 minutes.
Q11. [+2, -0.25]Mathematics
What is the perimeter of a square with side length 4 cm?
A. 12 cm
B. 14 cm
C. 16 cm
D. 20 cm
Correct Answer: C The perimeter of a square is calculated using the formula: Perimeter = 4 * side length. So, Perimeter = 4 * 4 = 16 cm.
Q12. [+2, -0.25]Reasoning
If A is 3 years older than B, and C is 2 years younger than B, what is the relationship between A and C?
A. A is 1 year older than C
B. A is 5 years older than C
C. A is 3 years younger than C
D. A is 2 years younger than C
Correct Answer: B If A is 3 years older than B, and C is 2 years younger than B, then A is 3 + 2 = 5 years older than C.
Q13. [+2, -0.25]Science
Which part of the human body is responsible for filtering blood and producing urine?
A. Liver
B. Lungs
C. Kidneys
D. Heart
Correct Answer: C Step 1: The kidneys are bean-shaped organs located on either side of the spine, just below the rib cage.
Step 2: Each kidney contains about 1 million nephrons (filtering units). They filter ~180 liters of blood daily to produce ~1.5-2 liters of urine.
Step 3: The urine then travels through the ureters to the bladder for storage and is excreted via the urethra.
Shortcut Trick: 'KID-neys = KID-ney filters'. The word 'renal' = related to kidneys. Remember the urinary system pathway: 'KUBU' - Kidneys -> Ureters -> Bladder -> Urethra.
Organ Function Summary:
- Kidneys: Filter blood -> produce urine
- Liver: Produces bile, detoxifies blood, stores glycogen
- Lungs: Gas exchange (O in, CO out)
- Heart: Pumps blood throughout the body
Common Mistake: The liver also filters blood, but it filters toxins and produces bile - it does NOT produce urine. The liver processes waste for excretion as bile (digestive waste), while kidneys produce urine (metabolic waste from blood filtration).
Q14. [+2, -0.25]General Knowledge
Who is the author of the book 'India After Gandhi'?
A. Ramachandra Guha
B. Narendra Modi
C. Jawaharlal Nehru
D. Mahatma Gandhi
Correct Answer: A Ramachandra Guha is the author of the book 'India After Gandhi: The History of the World's Largest Democracy'.
Q15. [+2, -0.25]Science
What is the largest living thing on Earth?
A. The Great Barrier Reef
B. The Amazon Rainforest
C. The Grand Canyon
D. The Great Wall of China
Correct Answer: A The Great Barrier Reef is the largest living thing on Earth, spanning approximately 2,300 kilometers off the coast of Australia.