RRB Group D Practice Quiz — Most-Expected Questions

20 original practice questions modelled on the recurring topics and difficulty of past RRB Group D papers — with answers & explanations. Free, no login. Tap an option to check your answer.

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Mathematics
What is 25% of 160?
Answer: 40. 25% of 160 = (25 ÷ 100) × 160 = 40.
Mathematics
What is the LCM of 4 and 6?
Answer: 12. The smallest number divisible by both 4 and 6 is 12.
Mathematics
Find the average of 10, 20, 30 and 40.
Answer: 25. Average = (10 + 20 + 30 + 40) ÷ 4 = 100 ÷ 4 = 25.
Mathematics
A car travels 240 km in 4 hours. Find its speed.
Answer: 60 km/h. Speed = distance ÷ time = 240 ÷ 4 = 60 km/h.
Mathematics
If the perimeter of a square is 40 cm, what is the length of its side?
Answer: 10 cm. Perimeter of a square = 4 × side, so side = 40 ÷ 4 = 10 cm.
Reasoning
Find the next term: 5, 10, 20, 40, ?
Answer: 80. Each term is doubled: 40 × 2 = 80.
Reasoning
Which one is different: Triangle, Square, Circle, Rectangle?
Answer: Circle. A circle has no straight sides or corners; the others are polygons.
Reasoning
Bird : Fly :: Fish : ?
Answer: Swim. A bird flies; a fish swims.
Reasoning
Ravi walks 10 m East, then turns left and walks 10 m. Which direction is he facing now?
Answer: North. Facing East and turning left means facing North.
Reasoning
If A = 1, B = 2 and C = 3, what is the sum of the letters in the word 'CAB'?
Answer: 6. Using A=1, B=2, C=3: C + A + B = 3 + 1 + 2 = 6.
General Science
What is the chemical formula for water?
Answer: H₂O. Water is made of two hydrogen atoms and one oxygen atom: H₂O.
General Science
Which part of the cell is called the powerhouse of the cell?
Answer: Mitochondria. Mitochondria produce energy and are called the powerhouse of the cell.
General Science
What is the SI unit of force?
Answer: Newton. The SI unit of force is the Newton (N).
General Science
Which gas is most abundant in the Earth's atmosphere?
Answer: Nitrogen. Nitrogen makes up about 78% of the Earth’s atmosphere.
General Science
How many bones are there in the adult human body?
Answer: 206. An adult human body has 206 bones.
General Awareness
Who is known as the 'Missile Man of India'?
Answer: A. P. J. Abdul Kalam. Dr. A. P. J. Abdul Kalam is called the 'Missile Man of India'.
General Awareness
In which year did the first passenger train run in India?
Answer: 1853. India's first passenger train ran in 1853, between Bombay and Thane.
General Awareness
Which is the longest river flowing within India?
Answer: Ganga. The Ganga is the longest river flowing within India.
General Awareness
What is the national animal of India?
Answer: Tiger. The Royal Bengal Tiger is the national animal of India.
General Awareness
How many players are there in a cricket team on the field?
Answer: 11. A cricket team has 11 players on the field.
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