List of top Questions asked in CBSE Class IX

A circular park of radius 20m is situated in a colony. Three boys Ankur, Syed and David are sitting at equal distance on its boundary each having a toy telephone in his hands to talk each other. Find the length of the string of each phone.

AB is a line segment and P is its mid-point. D and E are points on the same side of AB such that ∠ BAD = ∠ ABE and ∠ EPA = ∠ DPB (see Fig). Show that 

(i) ∆ DAP ≅ ∆ EBP 

(ii) AD = BE

AB is a line segment and P is its mid-point. D and E

A traffic signal board, indicating ‘SCHOOL AHEAD’, is an equilateral triangle with side ‘a’. Find the area of the signal board, using Heron’s formula. If its perimeter is 180 cm, what will be the area of the signal board?
An electric heater is rated 1500 W. How much energy does it use in 10 hours?
Why did Santosh’s parents agree to pay for her schooling in Delhi? What mental qualities of Santosh are brought into light by this incident?
If the moon attracts the earth, why does the earth not move towards the moon?
Give two practical applications of reflection of sound waves.
A freely falling object eventually stops on reaching the ground. What happenes to its kinetic energy?
Show that the diagonals of a square are equal and bisect each other at right angles.
A dome of a building is in the form of a hemisphere. From inside, it was whitewashed at the cost of ₹4989.60. If the cost of whitewashing is ₹20 per square meter, find the
(i) inside surface area of the dome,
(ii) volume of the air inside the dome
The passing of time will no longer affect her, says the poet. Which lines of the poem say this?
“A slumber did my spirit seal,” says the poet. That is, a deep sleep ‘closed off’ his soul (or mind). How does the poet react to his loved one’s death? Does he feel bitter grief ? Or does he feel a great peace?
Now fill in the blanks with suitable words from the ones that you have formed.
(i) Mass literacy was possible only after the __of the printing machine.
(ii) Ramesh is unable to tackle the situation as he lacks__.
(iii) I could not resist the__ to open the letter.
(iv) Hardwork and __are the main keys to success.
(v) The children were almost fainting with__ after being made to stand in the sun.
Identify the solutions among the following mixtures.
How did Santosh begin to climb mountains?

When did she leave home for Delhi, and why?

Why was Santosh sent to the local school?

How do you differentiate between capture fishing, mariculture and aquaculture?
Where does the traveler find himself? What problem does he face?
Why did Margie hate school? Why did she think the old kind of school must have been fun?
How does he describe the old kind of teachers?
What had once happened to Tommy’s teacher?
Answer the following with reference to the story.
“Sure they had a teacher, but it wasn’t a regular teacher. It was a man.”
(i) Who does ‘they’ refer to?
(ii) What does ‘regular’ mean here?
(iii) What is it contrasted with?

Answer the following with reference to the story. “I wouldn’t throw it away.”
(i) Who says these words?
(ii) What does ‘it’ refer to?
(iii) What is it being compared with by the speaker?

What subjects did Margie and Tommy learn?
Answer the question in few words or in couple of sentences.