# Important 3 Marks Question For CBSE Class 10 Maths

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## CBSE Class 10 Maths Board Exam 2020

You will find the important questions for CBSE class 10 Maths board exam 2020 at Vedantu official website for free pdf download. These important questions of 3 marks will help you score good if you master them as these are not only comparatively less difficult than 5 marks questions but are also more in frequency.Â

At Vedantu, you will be provided with NCERT Important Questions for Class 10 Maths with detailed solutions and answers. As per the latest CBSE Exam Pattern introduced, MCQ Questions for Class 10 Maths carries 20 marks.

### CBSE Class 10 Maths 2020

The only key to success in the CBSE exam is practice. You can begin with CBSE class 10 sample question papers with Answers 2020 Board Exams.

### CBSE Class 10 Maths 2020 Vedantu

• Important Questions for CBSE Class 10 Maths with Solutions and Answers

• Important questions for CBSE Class 10 Maths- chapter wise.

### Important Questions for CBSE Class 10 Maths Board Exam â€“ Chapters

• Important Questions for Real Numbers Class 10

• Important Questions for Polynomials Class 10

• Important Questions for Pair of Linear Equations in Two Variables Class 10

• Important Questions Quadratic Equations Class 10

• Important Questions Arithmetic Progressions Class 10

• Important Questions Triangles Class 10

• Important Questions for Coordinate Geometry Class 10

• Important Questions for Introduction to Trigonometry Class 10

• Important Questions for Some Applications of Trigonometry Class 10

• Important Questions for Circles Class 10

• Important Questions for Constructions Class 10

• Important Questions for Areas Related to Circles Class 10

• Important Questions for Surface Areas and Volumes Class 10

• Important Questions for Statistics Class 10

• Important Questions for Probability Class 10

### Important Frequently Asked Questions for CBSE Maths 10th BoardÂ

Solving the given some important questions here will help you to increase your speed and accuracy in the final examination, while increasing your chance to score excellently in the exam.

Here are some sample questions for Class 10 Mathematics: Important 3 Marks Questions:

Example 1: For Any Positive Integer a, Prove that pÂ³ â€’ o is Divisible by the Number 6.

Solution:

Let z = pÂ³ â€’ o

âŸ¹ p = p (pÂ²â€’1)

âŸ¹ z = p (p â€’ 1) Ã— (p+ 1) [âˆµ (pÂ² â€’ qÂ²) = {(p + q) (pâ€’q)}

z = (p â€’1) Ã— p Ã— (p + 1) ... (i)

We know that, if a number is completely divisible by 2 and 3, then it is also divisible by the number 6.

Letâ€™s conduct a divisibility test for 3:

Provided that the sum of digits of any number is divisible by 3, then it is divisible by 3:

Sum of the digits = (o â€’ 1) + (o) + (o + 1) = 3

âŸ¹ Thus, the Number is divisible by 3.

Divisibility test for 2:

Provided that o is odd then, (o â€’ 1) and (o + 1) will be even so, (o â€’1) Ã— o Ã— (o + 1) will be divisible by 2.

Provided that o is even then, (o â€’1) Ã— o Ã— (o + 1) will be divisible by 2.

Thus, for any positive integral value of o, o3 â€’ o is divisible by 6.

Example 2: At Present Neerajâ€™s Age (in years) are 2 more than the Square of His Son Johnâ€™s Age. When John Grows to Her Fatherâ€™s Current Age, Neerajâ€™s Age will be 1 Year Less than 10 Times the Current Age of Neeraj. Find the Current Ages of Both Father and Son.

Solution:

Let, Neerajâ€™s current age be = â€˜yâ€™ year

Thus, as per the 1st condition, John's current age = y2 + 2

John grows to his father's current age after [(y2 + 2) â€“ y] years.

Then, Neerajâ€™s age will be (y2 + 2) +Â  [(y2 + 2) â€“y] year.

Now, as per to the question,

(y2 + 2) + [(y2 + 2) â€“ y] = 10y â€“ 1

âŸ¹ 2x2 â€“ y + 4 = 10y â€“ 1

âŸ¹ 2x2 â€“ 11y + 5 = 0

âŸ¹ 2x2 â€“ 10y â€“ y + 5= 0

âŸ¹ 2y (y â€“ 5) â€“1(y â€“ 5) = 0

âŸ¹ (y â€“ 5) (2y â€“ 1) = 0

âŸ¹ (y â€“ 5) = 0 or (2y â€“ 1) = 0

âŸ¹ y = Â½ or 5

Thus, current age of John = 5years

And the current age of Neeraj = y2 + 2 = (5)2 + 2 = 27 years.

Q1. Where Can I Get the Class 10 Complete Set of 3 Important Questions?

Answer: You will find the complete set of questions for important 3 marks as well as 5 marks questions on Vedantu. Questions are available with step-by-step solutions and answer keys in free PDF format. These questions are thoroughly prepared by the subject matter experts at Vedantu assessing the trends followed in past yearsâ€™ board exams and following the latest syllabus.

Q2. How Can I Benefit Practicing from the Class 10 Important Questions?

Answer: It is actually pivotal for a board student to practice these important questions in order to get familiar with the most important units and questions of Class 10 Maths as well as track their preparedness for the upcoming Board Exam. These questions and answers will help students with easy and quick learning. Moreover, the detailed solutions provided at Vedantu will give candidates a knack for writing proper solutions.

Q3. How Many 3 Marks Questions are there in the 10th Board Mathematics Paper?

Answer: In CBSE Board Class 10 Mathematics, you will get Section â€“ C, that will comprise of 8 questions containing 3 marks each.