Question

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

Answer 1

Answer:

Hey Pal!

Step-by-step explanation: So taking a)

7*11*13+13

=> taking 13 out 13(7*11+1)

13*78

=> 13*2*3*13

b)

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

=> taking 5 out 5(7*6*1*4*3*2*1+1)

5*1261

=>  5*13*97