Question

Is the number a multiple of 8? Write yes or no. 4, 8, 20, 40.WHAT IS MULTIPLE

Answer 1

Consider two integers $x,y$. We say that $x$ is a multiple of $y$ if $x$ is evenly divisible by $y$:

$\dfrac{x}{y} = k,\quad x,y,k \in \mathbb{Z}$

Alternatively, we can say that $x$ is a multiple of $y$ if there exists an integer $k$ such that $x = ky$

So:

• 4 is not a multiple of 4, because 4/8 is not an integer.
• 8 is a multiple of 8, because 8/8=1
• 20 is not a multple of 8, because 20/8 is not an integer
• 40 is a multiple of 8, because 40/8=5