In this article you will get a set of important questions for both CBSE Class 9 Mathematics and Science exams 2018.
All the questions given here are prepared after carrying a thorough analysis of the past year exam trends and the latest examination pattern. Questions have been picked from all important topics of Class 9 Maths and Science. All these questions are fully solved.
Some prominent features of the set of important questions given here are:
CBSE Class 9 Mathematics Important Questions for Annual Exams 2018:
In class 9 Mathematics exam, there will be four sections:
SectionA comprised of 1 mark questions (6 questions) 
SectionB comprised of 2 marks questions (6 questions) 
SectionC comprised of 3 marks questions (10 questions) 
SectionD comprised of 4 marks questions (8 questions) 
CBSE Class 9 Mathematics Solved Practice Paper: 2018
Some sample questions from the set of important questions of class 9 Mathematics are:
Q. If the graph of equation 2x + ky = 10k, intersect xaxis at point (2, 0) then find value of k.
Sol.
Here, 2x + ky = 10k ...(i)
At point (2, 0), equation (i) becomes:
2(2) + k(0) = 10k
⟹ 4 = 10k
⟹ k = 10/4 = 0.4
Q. A batsman in his 11th innings makes a score of 68 runs and there by increases his average score by 2. What is his average score after the 11th innings?
Sol.
Let the average score of 11 innings be x.
Then the average score of 10 innings = x – 2
Total score of 11 innings = 11x
Total score of 10 innings = 10(x – 2) = 10x – 20
Score of the 11th innings = Total score of 11 innings – Total score of 10 innings
= 11x – (10x – 20)
But x + 20x + 20 = 68 (Given )
⟹ x = 48
Hence, the average score after the 11th innings is 48.
Q. If a + b + c = 6 and ab + bc + ca = 11, find the value of a^{3 }+b^{3 }+c^{3 }− 3abc.
Sol.
(a + b + c)^{2} = a^{2 }+ b^{2} +c^{2} +2(ab + bc + ca)
(6)^{2 }= a^{2 }+ b^{2} +c^{2} + 2 × 11
a^{2 }+ b^{2} +c^{2} = 36 – 22 = 14
a^{3 }+b^{3 }+c^{3 }− 3abc =( a + b + c)[ a^{2 }+ b^{2} +c^{2} −(ab + bc + ca)]
= 6 × (14 − 11)
= 6 × 3 = 18
Get the complete set of CBSE Class 9 Mathematics Important Questions 2018 
CBSE Class 9 Science Important Questions for Annual Exams 2018:
In class 9 Science exam, there will be two sections consisting of 27 questions of different weightages:
Section A contains 
Two questions of 1 mark each 
Three questions of 2 marks each 

Ten questions of 3 marks each 

Six question of 5 marks each 

Section B contains 
Six practical based questions of 2 marks each 
CBSE Class 9 Science Solved Practice Paper: 2018
Some sample questions from the set of important questions of class 9 Science are:
Q. What is role of tissues present in multicellular organisms?
Ans.
The formation of tissues is important in multicellular organisms as :
(i) Grouping of cells and performing a single function by the group shows division of labour.
(ii) Tissues combine to form organ, organ to organ system and organ systems to organisms.
(iii) Due to improved organisation and higher efficacy organisms have high survival rate.
Q. (a) What happens to the buoyant force as more and more volume of a solid object is immersed in a liquid? When does the buoyant force become maximum?
(b)Define buoyant force. Name two factors on which buoyant force depends.
Ans.
(a) The buoyant or upthrust force increases as more and more volume of a solid object is immersed in a liquid. When object is fully immersed in water the buoyant force becomes maximum.
(b)Fluid applies an upward force on a solid which is partially or fully submerged in liquid. This phenomenon is called buoyancy (Upthrust) and applied upward force is called buoyant force.
Two factors on which buoyant force depends:
• Volume or shape of object.
• Density of fluid in which object is immersed.
Q. In which of the two, glycerine or kerosene, the loss in weight of a solid when fully immersed in them will be more and why ?
Ans.
Density of glycerine is more than that of kerosene.
A liquid having higher density exerts more upthrust force on object than other liquid having low density. Thus, greater the density of a liquid, the more will be the the buoyant force exerted on the object immersed in it. Now, due to this greater upthrust (buyont force), the object experiences greater apparent weight loss.
Thus in case of glycerine, the loss in weight of a solid when fully immersed in it will be more than when immersed in kerosene.
Get the complete set of CBSE Class 9 Science Important Questions 2018 
Practicing all the important questions given here will help students make a quick but effective preparation for their CBSE Class 9 Exams 2018.
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