1.  n is a whole number which when divided by 4 gives 3 as remainder. What will be the remainder when 2n is divided by 4 ?
A. 3
B. 2
C. 1
D. 0

Answer: Option B

Explanation:

Let n = 4q + 3. Then 2n = 8q + 6 = 4(2q + 1 ) + 2.

Thus, when 2n is divided by 4, the remainder is 2.