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CBSE Class 10 Mathematics Exam 2019: Important 1 mark questions with solutions

Jan 11, 2019 09:44 IST

    In this article you will get CBSE Class 10 Mathematics: Important 1 Mark Questions. All the questions have been provided with proper solution to help you make an easy and quick preparation.

    CBSE Class 10 Mathematics: Important 1 Mark Questions
    CBSE Class 10 Mathematics: Important 1 Mark Questions

    In order to master a subject, on must have a set of questions based on various topic 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 confidents for the exams.

    Here, we are providing a set of most important 1 mark questions to prepare for CBSE class 10 Mathematics board exam 2019. All these questions have been provided with detailed solutions explained by the subject experts.

    Students may download the whole question bank for CBSE Class 10 Maths Exam 2019 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

    CBSE Class 10 Mathematics Solved Sample Paper 2019

    Q. If the common difference of an A.P. is 3, then find a20 – a15.

    Sol.

    Let the first term of the AP be a.

    an = a(n − 1)d

    a20 – a15 = [a + (20 – 1)d] – [a + (15 – 1)d]

                  = 19d – 14d

                  = 5d

                  = 5 × 3

    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 (2010-2018)

    Q. For what value of k will k + 9, 2 k ‒ 1 and 2k + 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(2k − 1) = (k + 9) + (2k + 7)
    ⟹       4k – 2 = 3k + 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:

    CBSE Class 10 Mathematics: Important 1 Mark Questions

    In CBSE Class 10 Mathematics Board Exam 2019, Section - A will comprise 6 questions of 1 mark each.

    Students must practice the important questions given here. This will help them to track their preparedness for the final exam and also get an idea about the important topics of class 10 Maths to be prepared for the exam. Moreover, the solutions provided here will give students an idea about how to write proper solution to each question in the board exam so as to score optimum marks.

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