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=Question 2

=Question 3

=Question 4

=Question 5

=Question 6

=Question 7

 

Question 6. Explain why 7 × 11 × 13 + 13 and 7 × 6 × 5 × 4 × 3 × 2 × 1 + 5 are composite numbers.

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Question 6. Explain why 7 × 11 × 13 + 13 and 7 × 6 × 5 × 4 × 3 × 2 × 1 + 5 are composite numbers.

Answer:

7 × 11 × 13 + 13
Take 13 common there we get
13  (7 x 11 +1 )
13(77 + 1 )
13  (78)
It is product of two numbers and both numbers are more than 1 so it is a composite number

7 × 6 × 5 × 4 × 3 × 2 × 1 + 5
Take 5 common there we get
5(7 x 6 x 4 x 3 x 2 x 1 +1)
5(1008 +1)
5(1009)
It is product of two numbers and both numbers are more than 1 so it is a composite number



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NCERT Solutions for class 10 Chapter 1 Exercise 1.2 Question 6. Explain why 7×11×13 + 13 and 7×6×5×4×3×2×1 + 5 are composite numbers
composite numbers with examples, Composite Numbers | Explain why Given numbers are composite

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