Question

When n is divided by 4, the remainder is 3. The remainder when 2n is divided by 4 ​

Answer 1

n=4q+3(given)

now

cause its twice is divided by 4

so 2n= 8q+6

hence when we divide this by 4

8q cancels out and 0n dividing 6 by 4 we get 2

2n= 4(2q+1)+2