Question

Using divisibility tests determine $572$ is divisible by $4$ and divisible by $8$:

Answer 1

If the last two digits of a whole number are divisible by $4$, then the entire number is divisible by$4$.
When $72÷4=18$, therefore $72$ is divisible by $4$.
If the last three digits of a whole number are divisible by $8$, then the entire number is divisible by $8$.
When $572$ is divided by $8$ we get remainder $4$, therefore $572$ is not divisible by $8$
Hence, $572$ is divisible by $4$ but not divisible by $8$.