Question

explain why 7*11*13+13 and 7*6*5*4*3*2*1+5 are composite numbers​

Answer 1

Answer:

First solve them,

7 x 11 x 13 + 13 (Using BODMAS rules)

1014

7 x 6 x 5 x 4 x 3 x 2 x 1 + 5

5045

Both of them are composite numbers as composite number is when it has more than two (unlike prime numbers).

1014: 1, 2, 3, 6, 13, 26, 39, 78, 169, 338, 507, 1014 (more than 2 factors)

5045: 1, 5, 1009 (more than 2 factors)