Question

explain why 2x3x13x17x5+13 is a composite number

Answer 1

Answer:

I can write

2×3×13×17×5+13 as 13{2×3×17×5+1}

this means that the number is product of 13 & {2×3×17×5+1}

and composite number is product of 2 numbers other than 1

Answer 2

Answer:

a composite number is number which have more than 2 factors,here this number has also more than two factors

$2 \times 3 \times 13 \times 17 \times 5 + 13 = 13(2 \times 3 \times 17 \times 5 + 1) = 13 \times 511$