CBSE Class 10 Sample Paper for 2026 Boards - Maths Standard

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Question 36 (iii) (Choice A) - CBSE Class 10 Sample Paper for 2026 Boards - Maths Standard - Solutions of Sample Papers for Class 10 Boards

Last updated at Aug. 26, 2025 by

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Question 36 (iii) - Choice (A) Find the sum of first 10 terms of the progression written by Aryan.First AP by Aryan is –5, –2, 1, 4, …. Here, First term = a = –5 Common difference = d = 3 We know that Sum of AP = 𝒏/𝟐 (2a + (n – 1) d) Putting a = –5, d = 3, n = 10 Sum = 𝟏𝟎/𝟐 (2 × (–5) + (10 – 1) × 3) = 5(–10 + 9 × 3) = 5 (–10 + 27) = 5 (27 – 10) = 5 (17) = 85

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 15 years. He provides courses for Maths, Science and Computer Science at Teachoo