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CBSE Class 10 Pre Board 2021 : Mathematics Standard - Set 1 (CBSE Gulf Sahodaya Qatar Chapter, Doha)

8 pages, 120 questions, 3 questions with responses, 3 total responses,

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PRE-BOARD EXAMINATION-2020-21 SUBJECT MATHEMATICS- STANDARD Class: X (CBSE) Total Marks: 80 Date . Time: 3 hrs General instructions: 1. This question paper contains two parts A and B. 2. Both Part A and Part B have internal choices. Part A : 1. It consists of two sections I and II 2. Section I has 16 questions. Internal choice is provided in 5 questions. 3. Section II has four case study-based questions. Each case study has 5 case-based subparts. You have to attempt any 4 out of 5 sub-parts. Part B: 1. It consists of three sections III, IV and V 2. Question No 21 to 26 are Very short answer Type questions of questions 2 marks each. 3. Question No 27 to 33 are Short answer Type questions of 3 marks each. 4. Question No 34 to 36 are Long answer Type questions of 5 marks each. 5. Internal choice is provided in 2 questions of 2 marks, 2 questions of 3 marks and 1 question of 5 marks. PART A Section I Section I has 16 questions of 1 mark each. Internal choice is provided in 5 questions. 1. Given that HCF (2520, 6600) = 40, LCM (2520, 6600) = 252 k, then find the value of k. OR 14587 The decimal representation of 21 54 will terminate after how many decimal places? 1 2. If one zero of the quadratic polynomial 4 2 8 kx 9 is negative of the other , find the value of k. 1 3. Find the value of k for which the system of equations kx +2 y= 5, 3x+y = 1 has unique solution? 1 4. If x = a, y= b, is the solution of the systems of equations x-y = 2 and x+ y = 4 then find the values of a and b. 1 5. Find the sum of first 16 terms of the AP: 10, 6, 2 .. OR The first term of an AP is -7 and the common difference is 5. Find its general term. 1 6. If one root of the quadratic equation 2 2 +kx-6 = 0 is 2, find the value of k. 1 7. Solve the Quadratic equation 3 2 + 10 x+7 3 = 0. OR Find the value of k for which the equation 2k 2 - 40x +25 = 0 has equal roots. 1 Page 1 of 8

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