2009 · Q100
When a natural number n is divided by 4, the remainder is 3. What is the remainder when 2n is divided by 4?
Elementary MathematicsNumber System
- A1
- B2
- C3
- D6
Explanation
n = 4k+3 gives 2n = 8k+6 ≡ 2 mod 4.
When a natural number n is divided by 4, the remainder is 3. What is the remainder when 2n is divided by 4?
Explanation
n = 4k+3 gives 2n = 8k+6 ≡ 2 mod 4.