Question

When a positive integer k is divided
by 6, the remainder is 1. What is the
remainder when 5k is divided by 3?

Answer 1

Answer:

$3$

Step by step explanation:

According to the task, $k = 6n+1$, $n$ is an integer. $5k = 30n + 5=3*10n+3*1+2=3(10n+1)+2$. That`s why $5k$ has a remainder $2$ when it is divided by $3$.