Question

Explain why 6*5*4*3*2*1*+4*3*2*1-3*2*1 is composite

Answer 1

6*5*4*3*2*1+4*3*2*1-3*2*1 =

6*5*4*3*2*1+(4-1)*3*2*1=

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

3*2*1*(6*5*4+3)

this number has more than 2 factors, therefore is composite