Answer :
Yes, 0 for example.
Generally, every number:
N = 6*7*k = 42*k, where k is integer
is divisible by 6 and 7 (0, 42, -42, 84, -84,...).
Generally, every number:
N = 6*7*k = 42*k, where k is integer
is divisible by 6 and 7 (0, 42, -42, 84, -84,...).