This question is similar to Chapter 1 Class 10 Real Numbers - Ex 1.1

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https://www.teachoo.com/1469/488/Ex-1.2--6---Explain-why-7-x-11-x-13---13-and-7-x-6-x-5/category/Ex-1.2/

Show that the number 2×5×7×11+11×13 is a composite number. - CBSE Class 10 Sample Paper for 2026 Boards - Maths Basic

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Question 21 (A) Show that the number 2 × 5 × 7 × 11 + 11 × 13 is a composite number.Now, 2 × 5 × 7 × 11 + 11 × 13 = 11 × (2 × 5 × 7 + 13) = 11 × (70 + 13) = 11 × 83 Since it has more than two factors (11, 83, 1), ∴ It is a composite number

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