Question

explain why 7*13*11+11 ia a composite number ​

Answer 1

Answer:

$7 \times 13 \times 11 + 11 \\ = 11(7 \times 13 + 1) \\ = 11(91 + 1) \\ = 11 \times 92 \\ = 11 \times 2 \times 46 \\ = 11 \times 2 \times 2 \times 23 \\ = {2}^{2} \times 11 \times 23 \\ hence \: 7 \times 13 \times 11 + 11 \: is \: a \: composite \: number$

Answer 2

Answer:

The total of the above is 1012 is a composite no. because it is divisible in various tables like it is divisible by 2 because the divisibility test of two is that the number's last digit should end with 2,4,6,8,0 including itself where as prime numbers are those which are not divisible by any number other than one and itself.