Question

check whether 5*3*11+11 and 13*5*3*2+3 are composite or not. class 10 cbse

Answer 1

5*3*11+11
11(5*3)+(1)
11x15x1. it is a composite no.
13*5*3*2+3
3(13*5*1*2)+(1)
it is composite numbers because they more than 2 factors.

Answer 2

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➡ 5 × 3 × 11 + 11

=> 11 ( 5 × 3 + 1 )

=> 11 ( 15 + 1 )

=> 11 × 16

=> 176

since, 5 × 3 × 11 + 11 has more than two factor other than 1 .

Therefore, we can say that it is a composite number.

➡ 13 × 5 × 3 × 2 + 3

=> 3( 13 × 5 × 2 + 1 )

=> 3 × 131

Since, 13 × 5 × 3 × 2 + 3 has more than two factor other than 1 .

Therefore, we can say that it is a composite number.

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