a-=b(mod n)

If a equiv b (mod n), then a^3 equiv b^3 (mod n) (write true or false).

If p is a prime and ab-=0 (mod p) then show that either a=0 (mod p) or b-=0 (mod p).

If 59-=3 (mod 7) , 46 -=4 (mod 7) then 105 -= …. (mod 7 ), 13-=…. (mod 7) , 413-= …… (mod 7) , 368 -= ….. (mod 7).

If a -= b (mod m) and x is an integer , then which of the following is incorrect ?

If a -= b (mod m) and the remainder obtained when 'a' is divided by m is 2, then find the remainder when 'b' divided by m.

Find congruent solutions of 155-=7 (mod 4).