Question

Show that one and only one out of n n+4 n+8 n+12 and n+16 is divisible by 5

Answer 1

Answer:

n=1,2&3

n+4=1+4=5,5/5=1

n+8=2+8=10,10/5=2

n+12=3+12=15,15/5=3

hence it is consecutive