# CBSE Class 10 Mathematics Exam 2021: Important 1 mark questions with solutions

In this article you will get CBSE Class 10 Mathematics: Important 1 Mark Questions to be prepared for Part-A of paper for Board Exam 2021. All the questions are completely solved to help you make exam preparations in an easy and quick manner.

*CBSE Class 10 Mathematics: Important 1 Mark Questions*

In order to master a subject, on must have a set of questions based on various topics and concepts discussed in that subject. Solving different questions helps to assess your preparedness and familiarise with the different ways in which a concept can be tested. This ultimately helps you to be more prepared and confident for the exam.

Here, we are providing a set of the most important 1 mark questions to prepare for CBSE class 10 Mathematics Board Exam 2021. All these questions have been provided with detailed solutions explained by the subject experts.

CBSE Class 10 Maths Paper in 2021 Examinations will have 20 objective type questions in Part-A and each question will carry 1 mark. These questions will be asked in different formats like multiple choice type questions (mcqs), very short answer type questions and case study based questions. All these questions will be based on the application of formulas and concepts. The one mark questions provided below by Jagran Josh will be very helpful to grasp all basic concepts very well which will ultimately make you efficient to answer the questions of any format.

**CBSE Class 10 Maths Exam Pattern for Board Exam 2021**

Students may download the whole question bank for CBSE Class 10 Maths Exam 2021 and practice the same while revising the Maths syllabus. Solving various questions will also help to increase your speed and accuracy.

**Given below are some sample questions from the set of CBSE Class 10 Mathematics: Important 1 Mark Questions:**

**Q.** If the HCF of 65 and 117 is expressible in the form of 65 m – 117, then find the value of m.

**Sol.**

We have, 65 = 13 × 5

And 117 = 13 × 9

Hence, HCF = 13

According to question 65m – 117 = 13

⇒ 65m = 13 + 117 = 130

⇒ m = 130/65 = 2

**Q. **If the common difference of an A.P. is 3, then find a_{20 }– a_{15}.

**Sol.**

Let the first term of the AP be a.

a_{n }= a(n − 1)d

a_{20 }– a_{15} = [a + (20 – 1)d] – [a + (15 – 1)d]

= 19d – 14d

= 5d

= 5 × 3 = 15

**Q.** Find the value of a so that the point (3, a) lies on the line represented by 2x – 3y = 5.

**Sol. **

Since point (3, a) lies on line 2x – 3y = 5.

Then, 2 x 3 – 3 x a = 5

⟹ 6 – 5 = 3a

⟹ a = 1/3

**CBSE Class 10 Mathematics Previous Years' Solved Question Papers (2010-2020)**

**Q.** For what value of *k* will *k* + 9, 2 *k* ‒ 1 and 2*k* + 7 are the consecutive terms of an A.P.?

**Sol. **

If three terms *x*, *y* and *z *are in A.P. then, 2 *y* = *x* + *z*

Since *k* + 9, 2* k* ‒ 1 and 2 *k* + 7 are in A.P.

∴ 2(2*k* − 1) = (*k* + 9) + (2*k* + 7)

⟹ 4*k* – 2 = 3*k* + 16

⟹ *k* = 18

**Q.** Find the median using an empirical relation, when it is given that mode and mean are 8 and 9 respectively.

**Sol. **

The relation between Mean, Median and Mode of the given data is:

Mode = 3Median − 2Mean

⟹ 8 = 3Median − 2 × 9

⟹ 3Median = 8 + 18

⟹ Median = 26/3

⟹ Median = 8.67

** To get the complete set of questions, click on the following link:**

**Also Check:**

**CBSE Class 10 Maths Chapter-Wise Important MCQs for Board Exam 2021**

**CBSE Class 10 Maths Exam 2021 - Check How to Attempt Case Study Based Questions**

**CBSE Class 10 Maths Important Questions for Board Exam 2021**

**Important: CBSE Class 10 Maths Complete Study Material & Preparation Guide for Board Exam 2021**

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