n is a whole number w

Question

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 ?

Options:

A . 3

B . 2

C . 1

D . 0

Answer: Option B

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

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

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