This question is similar to Chapter 1 Class 10 Real Numbers - Ex 1.1
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CBSE Class 10 Sample Paper for 2026 Boards - Maths Basic
CBSE Class 10 Sample Paper for 2026 Boards - Maths Basic
Last updated at Sept. 9, 2025 by Teachoo
Transcript
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